QUESTION 15 Observe the network diagram given below and name the casting type 1 (1 mark) 2. (1 mark) 3. (1 mark) QUESTION 11 Observer the figure Q4.1 and answer the following. a. Write the binary bit pattern of the digital signal b. Identify the type of Line Encoding Scheme, where X axis represents time and Y axis amplitude respectively. Amplitude X X X X X X Time Time Transition because next bitis QUESTION 14 Observe the network diagram given below and answer the following questions in your own words. a. Identify the type of topologies used in the network. (1 mark) b. Write about ONE disadvantage of the different topology used. (2 mark)