Given the depth vs. clock time function y = f(t) = .018 t² + -2.1 t + 78, with depth in cm when clock time is in seconds, find the clock time t such that f(t) = 73.75001 cm and find f(t) when t = 27 cm. Find the clock time when water depth is 43.75001 cm. Using the same function determine the depth at clock time t = 11 sec.