Question2uestion 5 (1 point) The height, $h$, in centimetres, of a piston moving up and down in an engine cylinder can be modelled by the function $h(t)=18 \sin (50 \pi t)+18$, where $t$ is the time, in seconds. What is the period? a) 50 s b) 0.04 cm c) 25 s d) 0.04 s