I am not sure how to do this

3. The processing time and precedence information for producing a certain product is given below. Using any model of your choice, a) Draw the assembly precedence diagram b) Assign the tasks (work elements) into a suitable number of stations. Assume circle times of (i) 0.8 min and (ii) 1.0 min c) For each of the circle times used, calculate i. The total idle time ii. Balance delay Work Element 3 Preceded by 1 3,4 9,10 8 11 2 10 7 5 9 1 12 6 4 Time (min) 0.7 0.6 0.5 0.4 0.38 0.32 0.3 0.27 0.2 0.12 0.11 0.1 5,8 3 2 6,7,8 11 3 1,2