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In Figure 1 below, the node A generates and sends frames of 500 bit long to node C through node B at a data rate of 100 Mbits/s. Between A and B, a sliding-window protocol with a window size of 10 is used,the propagation delay is 10 micro second/km. Assuming acknowledgment (ACK) are separate frames of negligible length and there are full duplex lines between the nodes

Calculate the time as a function of the distance x after which node A receives an ACK from node B. ) Calculate the time as a function of the distance y after which-node B receives the first ACK from node C. Stop-and-wait protocol is used between B and C and the propagation delay-and the frames are not changed.

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