I need some serious walk-through help with this calculus question involving trig.

B. The displacement (in oentiineters) of a partiole moving haok and forth along a straight line is given by the equation of motion s = 2 sin 11': + 3 oos arr, where I is measured in seeonds. (a) Find the average seloeity during eaoh titne period: (i) [1,2] (ii) [1, 1.1] (iii) [1, 1.111] (is) [1, 1.1101] (b) Estimate the instantaneous veloeity of the partiele when t = 1