Hellw could you help me with this question thank you

sin 3t . function y displacement against time t(s) for the time rna5S of ttte -0-114 u b )-0.87 0.63 0-56 vel O.su (b) Identify the position of any turning points and whether they are maxima, minima or oints of inflexion (c) Calcula e the turning points of the function using differential calculus and show which are maxima, minima or points of inflexion by using the second derivative (o j 236