If my CPU runs at 4.0GHz, and on average takes 10 clock cycles to complete an instruction, how many instructions will be completed in the time it takes to type "MY CPU IS RUNNING NOW"? Assume it takes 5 seconds to type the message. Show your work and how you arrived at the solution. Why is programmed 1/O used mainly for keyboard input, rather than for other I/O devices such as printers and displays? 4. A program is executing when several interrupts occur