An electronic equipment manufacturer has decided to add a component sub-assembly operation that can produce $$80$$ units during a regular $$8$$-hour shift. This operation consists of three activities as below .

For line balancing the number of work stations required for the activities $$M, E$$ and $$T$$ would respectively be

In an assembly line for assembling toys, five workers are assigned tasks which take times of $$10, 8, 6, 9$$ and $$10$$ minutes respectively. The balance delay for the line is