please answer

NB: time for number 8 should be 0.25 min

a) A small size electronic domestic appliance is to be produced on a single model assembly line, The work content of assembling the product has been reduced to the work elements listed in table 4 below. The line is to be balanced for 120,000 appliances per year The line will operate 45 weeks per year, 40 hours per week. The manning level will be one worker per station. If the uptime efficiency for the line is estimated to be 87% and the average reposition time loss per system is 12 seconds. Calculate the: i. ii. iii. hourly production rate. minimum number of stations required on the line. service time to which the line must be balanced. [4 marks] [3 marks] [1 mark] Table 4 - Assembly Data No. 1 2 3 4 5 6 7 8 9 10 11 12 Work Element Description Placed frame in work holder and clamp Assemble plug, grommet to power cord Assemble brackets to frame Wire power cord to motor Wire power to switch Assemble mechanism plate to bracket Assemble blade to bracket Assemble motor to brackets Align blade and attach to brackets Assemble switch to motor brackets Attach cover, inspect and test Place in tote pan for packing TEK (min.) Precedence 0.28 0.47 0.80 1 0.25 1,2 0.30 2 0.15 3 0.35 3 0. 3,4 0.30 6, 7, 8 0.40 5,8 0.55 9, 10 0.15 11 b) Draw the precedence diagram for the assembling operation in table 4 above. c) Balance the assembly line problem in part (a) above. State the rule used. [5 marks] [7 marks]