Class Features:  __init__(self, basic_rate, default_mins, rate_per_min, has_rollover): create/initialize instance
variables for all four non-self parameters. You can assume all arguments are valid and there
is no need to perform any checking.
 __str__: create/return a string as in this example:
"Basic˽rate:˽25.50,˽Default mins: ˽ ˽200,˽Rate/min:˽0.50,˽Rollover:˽Tru e"

add_phone(phone): Add the given phone line to the end of the list of phone lines. If there is already a phone in the plan by the same area code and number, do not append and return False. All updates made in this method change instance variables directly and the method returns None. Hint: Your Phone class's __eq__ method can help.
 remove_phone(phone): Remove the given phone line from the list of phone lines; remove calls that are only associated with the given phone (not any other phone of this plan) from the list of calls. A call is associated with a phone line if the line is either its caller or callee. If phone is not present in the list of phone lines, perform no removal and return False. All updates made in this method change instance variables directly and the method returns None. Hint: Your Phone class's __eq__ method can help.

Create a pseudocode design to prompt a student for their student id and the titles of the three classes they want to add. the solution should display the student’s id and a total bill. • bill a student using the following rules: o students can only add up to 3 classes at a time.

Write a method named addall that could be placed inside the hashintset class. this method accepts another hashintset as a parameter and adds all elements from that set into the current set, if they are not already present. for example, if a set s1 contains [1, 2, 3] and another set s2 contains [1, 7, 3, 9], the call of s1.addall(s2); would change s1 to store [1, 2, 3, 7, 9] in some order. you are allowed to call methods on your set and/or the other set. do not modify the set passed in. this method should run in o(n) time where n is the number of elements in the parameter set passed in.

Write a program that displays the following menu: geometry calculator 1. calculate the area of a circle 2. calculate the area of a rectangle 3. calculate the area of a triangle 4. quit enter your choice (1-4): if the user enters 1, the program should ask for the radius of the circle and then display its area. use the following formula: area = ď€(the square of r) use 3.14159 for ď€ and the radius of the circle for r. if the user enters 2, the program should ask for the length and width of the rectangle and then display the rectangle’s area. use the following formula: area = length * width if the user enters 3, the program should ask for the length of the triangle’s base and its height, and then display its area. use the following formula: area = base * height * .5 if the user enters 4, the program should end. input validation: display an error message if the user enters a number outside the range of 1 through 4 when selecting an item from the menu. do not accept negative values for the circle’s radius, the rectangle’s length or width, or the triangle’s base or height. note: if the user enters an improper menu choice (1-4), the program prints "the valid choices are 1 through 4. run the program again and select one of those." if the user enters a negative radius, the program prints "the radius can not be less than zero." if the user enters a negative value for height or base, the program prints "only enter positive values for base and height."