Given the depth vs. clock time function y = f(t) = .021 t² + -2.4 t + 72, with depth in cm when clock time is in seconds, find the clock time t such that f(t) = 45.42857 cm and find f(t) when t = 33 cm. Find the clock time when water depth is 11.42857 cm. Using the same function determine the depth at clock time t = 11 sec.