Using the assembly$-$line balancing procedure, you have just determined $8$ workstations that make up

the assembly line, and the sums of the task times in each workstation are $7,5,6,8,5,7,7,$ and $6$

minutes. How many hours does the assembly line need in order to produce $90$ products?

a$.18$

b$.7$

c$.$ None of the other answers is correct

d$.12$

e$.6$