Asender wants to transmit 12 frames in data link layer to a receiver, and every 4th transmission is lost. how many total transmissions are required if, a. go-back-3 flow control is used? b. selective repeat is used? c. stop-and-wait is used?

Assume a class window with accessor method getwidth that accepts no parameters and returns an integer. assume further an array of 3 window elements named winarr, has been declared and initialized. write a sequence of statements that prints out the width of the widest window in the array.