4. The following parameters are used for processor overhead calculation for interrupt I/O and DMA. 1000 MHz CPU Interrupt handler takes 400 cycles Data transfer takes 100 cycle . 8 MB/s, 16 B interface disk transfers data 50% of time DMA setup takes 800 cycles, transfer one 16KB page at a time a. Calculate processor overhead for interrupt I/O. [3 marks] Calculate processor overhead for DMA. [3 marks] b