$4.$Here are typical programs for time delay using loops when the microprocessor operates at $5$MHz$.$

a$)$ Draw the flow chart of each program and briefly explain how each functions

b$)$ What is the difference between the two programs

c$)$ What is the initial value of the registers for each program

d$)$ Compute the time$-$delay $T_D$ generate by each program

e$)$ In Program #$2,$ at which value register B should be initialized to produce a delay of $0\mathrm{.}1s.$