Math problem i cant figure out! help!?

The body mass index, I , can be used to determine an indiviuals risk for heart disease. An index less than 25 indicates a low risk. The body mass index is given by the formula, or model, I=700w/H^2, where W= weight in pounds , and H= height in inches. Jerome is 66 inches tall. What weight will keep his body mass index between 18 and 32?