Circadian rhythms are biological processes that oscillate with a period of approximately 24 h. That is, a circadian rhythm is an internal daily biological clock. Blood pressure appears to follow such a rhythm. For a certain individual, the average resting blood pressure varies from a maximum of 100 mmHg at 2:00 P. M. to a minimum of 80 mmHg at 2:00 A. M. Find a sine function of the form f(t) = a sin(ω(t − c)) + b that models the blood pressure at time t, measured in hours from midnight.