Hour

Machine $1$

Machine $2$

Machine $3$

$1$

RED

$2$

BLUE

RED

$3$

BLUE

$4$

BLUE

$5$

BLUE

$6$

BLUE

$7$

RED

$8$

RED

Refer to the figure above. Green will first be processed on machine $2$ for $1$ hour, then on machine $1$ for $2$ hours, and finally on machine $3$ for $1$ hour. Green is due at the end of hours $8.$ Red and Blue are fixed, you may not move them. Using Backward scheduling:

Group of answer choices

You will start Green on Machine $2$ in hour $5$

You will finish Green in Hour $7$

You will start Green on Machine $2$ in hour $1$

No feasible schedule is possible.