3a. In computer networking, what does the abbreviation Mbps mean? Megabit per second Determine the total time it takes to transmit an uncompressed grayscale image (with 8 bits per pixel) with a resolution of 1,366 x 768 pixels (typical size of a standard laptop screen) using each of the following transmission media. Be sure to show your calculations. 3b. 5 Mbps 4G cell phone data connection 3c. 12 Mbps DSL connection 3d. 100 Mbps Cable or Ethernet link 4. Assume that we need to transmit an HD-resolution (1920x1080) uncompressed color image (using 24 bits per pixel) over a computer network in less than 0.01 second. What is the minimum necessary line speed to meet this goal? Be sure to show your calculations. 5. (Refer to Figure 7.9 on page 350 or slide 21 in the Chapter 7 PowerPoint presentation) Suppose node A wishes to communicate with node B. How might the store-and-forward protocol compensate if the network detects that packets sent across the link from node A to node B do not arrive correctly at node B? 6. Given the following diagram, where the numbers represent the time delays across a link 6a. List all of the simple paths (those that do not repeat a node) from node A to G.6b. What is the shortest path from node A to node G? (Use the definition of "shortest path from section 7.3.3 of our textbook.) 6c. What is the overall delay of the path you chose for the 6b? 6d. If node Efails, does that change the shortest path? If so, what is the new shortest path