The radius of a circular disk is given as 28 cm with a maximum error in measurement of 0.2 cm. (a) Use differentials to estimate the maximum error (in cmz) in the calculated area of the disk. (Round your answer to two decimal places.) (b) What is the relative error? (Round your answer to four decimal places.) i: What is the percentage error? (Round your answer to two decimal places.) Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) y3 9(y)=2 y 3y+9 Find the absolute maximum and absolute minimum values of fon the given interval. f(t) = 2 cos(t) + sin(2t), [0, 71/2] absolute minimum value absolute maximum value