Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 s. The maximum rate of air flow into the lungs is about 0.3 L/s. This explains, in part, why the function f(t) = (3/10)(sin(2πt/5)) has often been used to model the rate of air flow into the lungs. Use this model to find the volume of inhaled air in the lungs at time t.