Please solve & show all work in word document

7-5 Out-of-Sight Telecommunications (OST) has preferred stock outstanding with a par value of $40 per share that pays an annual dividend equal to 5 percent. (a) If investors who purchase similar investments require a 10 percent return, what is the market value of OST's preferred stock? (b) What would be the market value of the stock if investors require an 8 percent return