2. A communications link provides 1 Mbps for communications between the earth and the moon. The link is used to send color images from the moon. Each image consists of 10,000x10,000 pixels, and 64 bits are used for each of the three-color components of each pixel. Ignore packet overhead and assume that t proc,ACK t (a) How many images per second can be transmitted over the link? (b) If each image is transmitted as a single block, how long does it take to get an acknowledgment back from earth? The distance between earth and the moon is approximately 375.000 km. (distance - C*tprop where C-3*108 m/sec) (c) Suppose that the bit error rate (BER) is 105 and packet overhead is 20 bytes. Also assume that Go- Back-N and Selective Repeat ARQ schemes are considered for error control. In both schemes window sizes are adjusted so as to fill the pipe, i.e., to keep the channel busy. Optimize your frame size for each protocol and compare their performance in terms of their ability (efficiency) to provide reliable transfer of images from the moon to earth (d) Repeat part c for BER-10-7