(8 Marks) Q4.1. Computer A tries to send 4 frames to computer B (0, 1, 2, and 3). The third frame (2) does not arrive correctly (assumed to be lost). 1. How many frames (DATA and ACK) are sent by the two computers assuming that they use a. Go-back-N ARQ with window size 4, where the receiver acquits each frame and the system time out will be after sending all frames? DATA:....... ACK: b. Stop-and-wait ARQ? DATA:........... ACK:.. 2. Draw the flow diagram for a (Go-back-N ARQ with window size 4) when the third frame is lost