There is the following program:

Program

Instruction mix

Instructions of Type $1$: $20\%$

Instructions of Type $2$: $50\%$

Instructions of Type $3$: $30\%$

Dynamic instruction count

$2*109$ instructions

And the following computer:

Computer

Cycles per instruction

Instruction of Type $1$: $1$ cycles$/$instr

Instruction of Type $2$: $2$ cycles$/$instr

Instruction of Type $3$: $3$ cycles$/$instr

Frequency

$2\mathrm{.}5$ GHz

Questions:

What is the average CPI of the given program on the given computer?

How fast $($in seconds$)$ the program will execute?

Show the whole solution process, not just the answer $($no solution $=0$ points$).$ Don't forget to use measurement units. Assume that the program runs without any interruptions.

Good luck!