Need help understanding

1. The pasitian of an abject at anytime t is given by slt} = 3fi 'l-Ii'3 + 126i2 9. a] Determine the velocity of the object at any time. Is} Does the object ever stop ta change the direction? c] IWhen is the abject moving tn the right and when is the object moving to the left? 2] Determine where the function bk}: 5 + 4023 52" 425 is increasing and decreasing? 3] Evaluate Iim Him\") lac>9 :Ln{5a]