Time Sink Incorporated is about to begin selling its computer game software to college students in the midwest. The following table shows the states that could be covered by salespersons based at 4 possible locations, together with the annual sales (in thousands of dollars) expected if all those states were covered from that base.

Base Ames Beloit Normal Avon MN * * — —

IA * * * —

MO * — * —

WI — * * —

IN — — * *

KY — — — *

Sales 115 90 150 126 Time Sink wants to choose a collection of bases that maximizes total sales without assigning the same state to more than one base.

Do

(a) and

(b) as in Exercise 11-7.