1. Consider a 10Mbps shared Ethernet with Bus Topology. The total length of the cable is 2000m and the propagation speed is 2x10 m/s. Station A, on one side of the bus, starts sending a long frame at t₁ = 0. Station C, on the other side of the Bus starts sending a long frame at time t2 = 3usec. The size of the frame is long enough to guarantee the detection of collision by both stations. Find: a. The time when station C detects the collision, ts. b. The time when station A detects the collision, t4. c. The number of bits station A has sent before detecting the collision. d. The number of bits stations C has sent before detecting the collision

Define users, giving the three groups of users there are.

All foreign language results should be rated Fails to Meet. a) True b) False

Students: Johnson, Williams, Matt, Jones, Eric, Lili, John and Jason, whose grades are listed below. Each column is the grades each student received. There are 8 students with 10 grades each. Johnson: 79, 92, 85, 0, 100, 64, 72, 99, 90, 86 Williams: 80, 75 93, 94, 0, 90, 89, 88, 87, 86 Matt: 82, 67, 72, 74, 89, 0, 70, 89, 100, 76 Jones: 85, 84, 82.5, 82, 84, 80, 80.5, 90, 96, 85 Eric: 90, 91, 87, 85.5, 86.5, 0, 90, 90, 91, 92 Lili: 60, 75, 81, 70, 80, 81, 94, 67.5, 99, 98 John: 79,0, 74, 96, 88.5, 88, 0, 100, 86, 83 Jason: 89, 90, 90, 85, 85, 90, 91, 88, 100, 79 Write user-defined functions or build-in functions (e.g., sum, mean, max, min, etc.) to calculate: The Average Grade of each student; this average should be a vector. The average of the class; this average is a scalar vector. The highest grade among the Average Grade of Each Student The lowest grade among the Average Grade of Each Student Show a table with each student's name, average grade and letter score using A, B, C, D, F…

For questions 6-9, create a truth table for each statement. 6. A ⋀ ~B 7. ~(~A ⋁ B) 8. (A ⋀ B) → C 9. (A ⋁ B) → ~C