(a) Implement a class Student. For the purpose of this exercise, a student has a name and a total quiz score. Supply an appropriate constructor and methods
getName(), addQuiz(score), getTotalScore(), and getAverageScore(). To compute
the latter, you also need to store the number of quizzes that the student took.
(b) Modify the Student class to compute grade point averages. Methods are needed
to add a grade and get the current GPA. Specify grades as elements of a class
Grade. Supply a constructor that constructs a grade from a string, such as "B+".
You will also need a method that translates grades into their numeric values (for
example, "B+" becomes 3.3). [You may obtain traditional grading scales from here
http://en. wikipedia. org/wiki/Academic_grading_in_the_Un ited_States]

Qr or codes let any piece of print host a link to online information.

Consider a slotted aloha system, where the time slot equals the fixed duration of each packet. assume that there are 4 stations a,b,c,d sharing the medium. (a) stations a,b,c,d receive one packet each from higher layers at times 1.3, 1.5, 2.6,5.7 respectively. show which transmissions take place when, according to the slottedaloha protocol; describe all transmissions until all four packets have been successful.when needed, each station has access to the following sequence of random number, provided by a random number generator and drawn uniformly between 0 and 1: (1) station a draws numbers: 0.31, 0.27, 0.78, 0.9, 0.9, 0.11, 0. (2) station b draws numbers: 0.45, 0.28, 0.11, 0.83, 0.37, 0.22, 0. (3)station c draws numbers: 0.1, 0.2, 0.3, 0.4, 0. (4) station d draws numbers: 0.36, 0.77, 0.9, 0.1, 0.1, 0.1, 0.1, 0. (b) in slotted aloha, a station transmits in each time slot with a given probability. what probabilities would you assign to each of the four stations so as to: (i) maximize the efficiency of the protocol? (ii) maximize fairness among the four stations? (c) will the efficiency increase or decrease if we modify slotted aloha as follows: (i) get rid of slots and allow stations to transmit immediately? (ii) implement carrier sensing? (iii) implement collision detection? (iv) implement collision avoidance?

Rafael needs to add a title row to a table that he has inserted in word. what should he do? use the alignment options. use the merge and center option for all the cells in the top row. use the merge and center option on the first two cells in the top row. none of the above