B4. Answer all the following questions: [4 marks] a. A computer with 8 GB of memory and its word size is 4 bytes: [2 marks] 3. How many locations are there in the memory? 4. 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 1101. Answer the following questions: [2 marks] 1 1 1 SO si S2 S3 S4 0 0 Z=0 Z=1 3. Draw and fill the state table of the circuit. 4. Write the equations of the state variables