B4. Answer all the following questions: [4 marks] a. A computer with 16 MB of memory and its word size is 8 bytes: [2 marks] 1. How many locations are there in the memory? 2. How many address bits are required to access the memory locations? b. Based on the below state diagram of a circuit to detect the sequence 1011. Answer the following questions: [2 marks] SO S1 S2 S3 S4 Z=0 Z=1 1. Draw and fill the state table of the circuit. 2. Write the equations of the state variables