The operations manager for the blue moon brewing co. produces two beers: lite (l) and dark (d). two of his resources are constrained: production time, which is limited to 8 hours (480 minutes) per day; and malt extract (one of his ingredients), of which he can get only 675 gallons each day. to produce a keg of lite beer requires 2 minutes of time and 5 gallons of malt extract, while each keg of dark beer needs 4 minutes of time and 3 gallons of malt extract. profits for lite beer are $3.00 per keg, and profits for dark beer are $2.00 per keg. make the model including(a) what are decision variables? (b) what is the objective function? (c) what are the two constrains?