Need help with this question if someone could help me step by step

2. Consider a short, 10-meter link, over which a sender can transmit at a rate of 150 bits/sec in both directions. Suppose that packets containing data are 100,000 bits long, and packets containing only control (e.g., ACK or hand-shaking) are 200 bits long. Assume that N parallel connections each get 1/N of the link bandwidth. Now consider the HTTP protocol, and suppose that each downloaded object is 100 Kbits long, and that the initial downloaded object contains 10 referenced objects from the same sender. a. What is the total time needed to receive all objects via parallel downloads b. Now consider persistent HTTP without using parallel download, what is c. From the above computing, what conclusion can you get (suppose speed using non-persistent HTTP connections? the total time to receive all the objects? of light is 300*106 m/sec)