Stuck on c part

Cecil Bozarth Manufacturing has tested 200 units of a product. After 2,000 hours, 4 units have failed; the remainder functioned for the full 4,000 hours of the testing. The percent of failures is 2 % (enter your response as a whole number). The number of failures per unit-hour is 0.00000505 (round your response to eight decimal places). The number of failures per unit-year is (round your response to three decimal places)