Computer network questions. I need urgent help answering these questions.

Computer Networks Problems Question 5 5. assume that two nodes are directly connected via a submarine optical fibre cable, which goes from san francisco to Shanghai, china. the cable length is 10,000 km. The bandwidth of the cable is 100 Gbps. Assume that the speed of the light in the cable is 2*10m/s a.What is the one way propagation delay between the two nodes? b. Assume that we send a packet with 100 mega bytes from one node to the other, what's the transaction delay? What's the total delay (ignoring queueing delay and nodal processing delay)? c. Calculate the Round Trip Time (RTT) and Bandwidth product. What's the meaning for this value? d. Assume that the two nodes implement the pipeline sending and receiving, and that each packet is 1000 bytes. What's the minimum sliding window size that can keep the link busy? Assume that we use the minimum sliding window size calculated above, how many different sequence numbers do we need to have at the minimum if we use selective Repeat? (Hint: the number of different sequence numbers should be greater than or equal to 2 times the sliding window size)