1. A beam of light moves from a medium to another less dense medium. The critical angle is 60 degree. Find the TRUE statement(s) a. Reflection phenomenon when the angle of incidence is 40 degree. b. Refraction phenomenon when the angle of incidence is 100 degree. C. Refraction phenomenon when the angle of incidence is 50 degree. d. Reflection phenomenon when the angle of incidence is 80 degree. e. All of the above 2. Find the TRUE statement(s) for Unshielded Twisted Pair (UTP) cable. a. None of the above b. High gauge number tends to has lower reduction in the strength. C. UTP with 18 AWG is better than UTP 26 AWG in terms of long distance d. Low gauge number has the smaller the diameter. e. Bandwith for 18 AWG is better than 26 AWG. f. Low gauge number tends to has higher reduction in the strength. 3. Which of the following() is NOT the process of pulse code modulation (PCM) a. Encoding b. Sampling c. Quantizing d. None of the above 4. What is the value of r for the following diagram? 2 data elements 11 I signal clement a. 3 b. 1/2 C. 2 d. 11 e. 1 5. Consider a noiseless channel with a bandwidth of 4 KHz. If we want to transmit 24 Kbps on this channel, the minimum number of signal levels we a. 21 need is b. 16 C. 6 d. 8 e. 4 f. 12