The content of Program Counter and Accumulator Register in a basic computer at time T are 43B and 5EF7 respectively. At the same time, if the content of memory at address 43B, 5AB and 6C2 are 95AB, 06C2 and 65AB respectively.

a) State the contents of the Program Counter, Address Register, Data Register and Accumulator Register at the end of the instruction execution;

b) State the mode of address used in the instruction, and discuss the advantage and disadvantage of using this mode of address;