4.2 The table below lists the work elements in minutes) to be performed on an assembly line and the precedence requirements that must be satisfied. Annual demand for the product will be 70,000 units. The line will operate one shift at 1900 hours per year. Expected line efficiency (proportion uptime) is 92%. Repositioning time per cycle is 9 seconds. Manning level is 1.0 for all stations. The products will be moved through the line by a conveyor at a speed of 0.914 meters/min and all the stations are of equal length of 3.048 meters. Work element 1 2 3 4 5 6 7 8 9 10 11 12 13 Time (minutes) 0.4 0.7 1.1 1.1 0.8 0.3 0.9 1.2 1.0 0.5 0.8 0.3 1.4 Preceded by - - 1 1,2 2 3 4 5 5 6 7 8,9 10,11,12 4.2.6 Solve the balancing problem using the Kilbrige and Wester method. (14)