When using a non$-$pipelined execution system, then, the instruction I$1$ needs $100$ps$,$ I$2$ needs $120$ps$,$ and I$3$ needs $200$ps$.$ For the pipelined execution system, each instruction is divided into $3$ stages with stage $1$ needs $80$ps$,$ stage $2$ needs $100$ps$,$ and stage$3$ needs $150$ps$.$ If a program contains: $($I$1$; I$2,$ I$3,$ I$1$ and I$2)$ respectively. Then to execute the first instruction of the program above, the system needs:

a$.100$ps Using a single clock cycle.

b$.450$ps using a pipelined system.

c$.150$ps using a single clock cycle.