4. Cally:r Inc manufacture a fUll'gr' portable industrial vacuum cleaner. The table below shows P9P!" the times (in minutes) of the different processes. There are 400 minutes available for manufacturing the device in the plant each day. Daily.r demand is 50. Activity Description Time Predecessor A Attach wheels to tub 1 i B Attach motor to lid 3 A C Attach batter pack 2 B D Attach safety cutoff 4 B E Attach filters 1 C, D F Attach lid to tub 3 A G Assemble attachments 2 F H Function test 5 G I Final inspection 1 E, H 1 Packing 3 I Draw the appropriate precedence diagram for this production line. Assign tasks to workstations and determine how much idle time is present each cycle Discuss how this balance could be improved to 100%. What is the theoretical minimum number of workstations