$($Media selection problem$)$ The advertising direc$-$tor for Diversey Paint and Supply, a chain of four retail stores on Chicago$$s North Side, is consider$-$ing two media possibilities. One plan is for a series of half$-$page ads in the Sunday Chicago Tribune newspaper, and the other is for advertising time on Chicago TV$.$ The stores are expanding their lines of do$-$it$-$yourself tools, and the advertising director is interested in an exposure level of at least $40\%$ within the city$$s neighborhoods and $60\%$ in north$-$west suburban areas. The TV viewing time under consideration has$$an exposure rating per spot of $5\%$ in city homes and $3\%$ in the northwest suburbs. The Sunday newspaper has corresponding exposure rates of $4\%$ and $3\%$ per ad$.$ The cost of a half$-$page Tribune advertisement is $$925$; a television spot costs $$2,000.$ Diversey Paint would like to select the least$$costly advertising strategy that would meet desired exposure levels. QX$($a$)$ Formulate using LP$.($b$)$ Solve the problem. Please provide each step of excel solver and how to set up the solver