Question: $2(12$ points$)$

$($CLO$-3,$ PLO$-2)$

An electronic equipment manufacturer has decided to add a component subassembly operation that can produce $80$ units during regular $8-$hour shift. The operation consists of three activities as below:

For line balancing what would be the number of workstations required for the activities $1,2\backslash$& $3.$ draw the corresponding process flow diagram.