solve problem $2$

Problem $(2)$:

Given the information in problem $(1)$ and the information in the table below

Assume operations M$1,$ M$2,$ M$3,$ and M$4$ run for $8$ hours per day, five days per week. R$1,$ and

R $2$ are available for $6$ hours per day, five days per week.

a$.$ How many machines are needed to perform each operation?

b$.$ Considering the modifications provided in the table below, calculate the optimum number

of identical machines for each operation to assign an operator.