i need help with solving (c) and make it in steps

A manufacturer of lawn and garden equipment, is designing an assembly line to produce a new fertilizer spreader. Using the following information on the production process, construct a precedence diagram for the fertilizer spreader. The compmay operates 8 hours per per day. Furthermore, 500 spreaders are required per day. a. Compute the cycle time. b. Determine the minimum number of workstations needed. c. Using the "longest task time" rule, balance the assembly line