Given: A FiberLink with lengthof 800 km, bandwidth of 1Gbps, and speed of medium/light of 200,000 km/sec. A. What is the propagationdelay of the link?(pay attentionto bits and bytes)B. What is the transmission delayfor 2000-byteframe in this link?C.(10 points) Write a short Python program to calculatethe propagationdelay of a link. You need to ask the use to enter the link lengthand the mediumspeed). Show the program/code and an example of the output.

Write a grading program for a class with the following grading policies: a. there are two quizzes, each graded on the basis of 10 points. b. there is one midterm exam and one final exam, each graded on the basis of 100 points. c. the final exam counts for 50% of the grade, the midterm counts for 25%, and the two quizzes together count for a total of 25%. (do not forget to normalize the quiz scores. they should be converted to a percentage before they are averaged in.) any grade of 90 or more is an a, any grade of 80 or more (but less than 90) is a b, any grade of 70 or more (but less than 80) is a c, any grade of 60 or more (but less than 70) is a d, and any grade below 60 is an f. the program will read in the student’s scores and output the student’s record, which consists of two quiz and two exam scores as well as the student’s average numeric score for the entire course and final letter grade. define and use a structure for the student reco