Assume that a keyboard polling operation takes $300$ clock cycles and the processor has a cycle time of $12$ns$.$ The keyboard is polled $50$ times per second.

You are required to determine the percent of the CPU time required to poll the keyboard input to decide if a new character has arrived.

$($You may give your answers for parts a and b in scientific notation. E$.$g$.1\mathrm{.}5$ x $10^3$ OR as integers $1500$ and as a real number for part c of the question, eg: $0\mathrm{.}008.$ Do not use commas$)$

a$.$ What is the total number of cycles the processor can handle each second?

b$.$ Express your answer to part a as the most appropriate integer graduation of Hz$.($For example, $20$ GHz$.$ Note Hz is already written for you so simply type the integer followed by a space and then the graduation $-$ such as $20$ G$)$

Hz

c$.$ How many cycles are used to poll the keyboard every second?

d$.$ Percent of the CPU time required to poll the$$keyboard$=$

$\%$