2. The following precedence network is used for assembling a product. You have been asked to achieve an hourly output of 20 units. All times in this network are in minutes. What is the minimum number of workstations? 28 10 1.2 0.7 +30 0.1 h 0.8 20 Select one: a. 3 b. 1 c. 2 d. None of the provided options e. 4 Clear my choice