in facilites layout (deterministic model for machine fraction )

A certain part (0438) requires three assembly operations (L,M and Q) that are sequentially done on an automatic assembly line. The schedule designer requires this assembly line to produce 6000 parts/month, and the plant will be operating 4 weeks per month, six days per week, and 8 hours per day. The following information is known: The line is controlled by a computer that requires re-programing every lot of 750 parts. This re-programing process takes I hour on average. The available time in(hours) at operation (M) for producing the required quantity is: 1) 48 2)182 3)168