Solve it in 20 min maximum please , network engineering please solve it all

Question 21 5 Points Four channels are multiplexed using synchronous TDM. The rate of each channel is given by 500 hps and we use it units, provide a step-by-step calculation for the following: 1. Input bit duration 2. Input unit rate 3. Output frame rate 4. Output frame size Blank 1 Add your answer Question 20 1 Point In CSMA, the time taken for a signal to propagate from one end of the medium to the other is called Blank 1 Blank 1 Add your