An assembly line is to be designed to operate $8\mathrm{.}25$ hours per day and supply a steady demand of $275$ units per day. Here are the tasks and their performance times:

b$.$ What is the workstation cycle time required to produce $275$ units per day?

c$.$ What is the theoretical minimum number of workstations?

Note: Round up your answer to the next whole number.

Minimum number of workstations

d$.$ Assign tasks to workstations using the longest operating time.

Note: Leave no cells blank $-$ be certain to enter $"0"$ wherever required.