Problem $1$: The following table shows the number of instructions for a program

$\backslash$table$[[,$Arith,Store,Load,Branch,Total$],[$A$,650,100,600,50,1400]]$

CPU Time $=$ no of Instructions$*$ CPI $*$ clock cycle time

a$.$ Assuming that arit instruction takes $1$ cycle, load and store take $5$ and branches take $2$ cycles, what is the execution time of the program in a $2GHz$ processor?

b$.$ Find the global $($average$)$ CPI for the program $($hint: use the CPU time formula$)$

c$.$ If the number of load instructions can be reduced by $50\%$ and Arith operations increased by $20\%,$ what is the speed up from the original?