Answer the following short questions: a) How can the interrupt interface be re-enabled during the execution of an interrupt service routine? b) If an 8086 up is running at 10 MHz with 2 wait states, how long does it take to perform the interrupt acknowledge bus cycle sequence? c) How long does it take the above (in b) 8086 up to push the values of flags CS and IP to the stack? How much stack space do these values use. d) Distinguish between memory- mapped I/O and accumulator mapped I/O. e) If an 8088 is running at 5 MHz what is the duration of the output bus operation performed by executing the instruction OUT OCOH, AX