A local toy manufacturer operates a production line for a toy requiring 7 tasks, with a daily demand of 200 toys and an 8-hour workday. Task durations are as follows: Task A: 2.73 min, Task B: 2.01 min, Task C: 2.13 min, Task D: 2.0 min, Task E: 2.61 min, Task F: 2.71 min, and Task G: 2.95 min. Precedence rules are in place: Task A has no predecessors, Task B requires Task A, Tasks C and D require Task B, Task C must precede Task E, Task F requires both Task D and Task E, and Task G requires Task F. What is the minimum number of workstations needed?
a) 8
b) 4
c) None of them
d) Cannot determine
e) 5
