jonson's rule to determine the optimal sequencing for the five jobs to be on two machines in a fixed order $($Machine $1$ before Machine $2).$ The times in hours are given in the table below.

the optimal sequence?

the total flow time for this sequence?

ob is the first to be scheduled? Is it scheduled to be the first job $+?$ Explain.

Job

A

B

C

D

E

F

Machine $1$

$10$

$8$

$14$

$13$

$10$

$25$

$6$

Machine $2$

$11$

$17$

$10$

$7$

$8$