One of the three functions of a sliding window scheme is the orderly delivery of packets which arrive out of sequence. In Go-back-N, the receiver drops packets which arrives out of order. Assume the receiver sends an ACK for every packet it receives. (a) In Go-back-N, what is the required buffer size (receiver’s window size, RWS) at the receiver if sender’s window size (SWS) = 23? What the answer will be in Selective Repeat? (b) In sliding window with SWS = RWS = 5, the minimum required SeqNumSize (the number of available sequence numbers) is 10. Calculate the minimum required SeqNumSize for (i) a sliding window scheme with SWS = 6 and RWS = 3 (ii) a Go-back-N scheme with SWS = 6

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