A manufacturing system is designing a product layout for a new product. They plan to use this production line ten hours a day in order to meet forecasted demand of $900$ units per day. The following table describes the tasks necessary to produce this product:

TASK PREDECESSOR TIME$($seconds$)$

A $34$

B A $20$

C B $10$

D B $16$

E C $10$

F D$,$ E $24$

G F $38$

For output to equal forecasted demand, what will be the efficiency of the production line that uses the minimum number of workstations?