The pH in a reactor varies sinusoidally over the course of a day. Use least-squares regression to fit f(t) = A0+ C1(cos w0*t+theta) to the following data. Use your fit to determine the mean, amplitude, and time of maximum pH. Note that the period is 24 hr

Time, hr 0 2 4 5 7 8.5 12 15 20 22 24
pH 7.3 7 7.1 6.5 7.4 7.2 8.9 8.8 8.9 7.9 7