a manufacturer produces two models of toy airplanes it takes the manufacturer minutes t0 assemble model and minutes t0 package i. it takes the manufacturer 6 minutes to assemble model and minutes to package it: in given week, the total available time for assembling is 600 minutes and the tota available time for packaging is 560 minutes let x be the number of model units produced: let y' be the number of model units produced shade the region corresponding to all values of x and that satisfy these requirements