please answer all,it will appreciated.please explainit too.thank you The function \( s(t) \) describes the position of a particle moving along a coordinate line, where \( s \) is in feet and \( t \) is in seconds. \[ s(t)=t^{3}-18 t^{2}+81 t+10, \quad t \geq 0 \] (a) F 2 answers