radius vector of a point depends upon time T as R = Ct+bt^2/2,where c and b are constant vectors, find modulus of velocity and acceleration at any time t.​

Consider the following position function. find (a) the velocity and the speed of the object and (b) the acceleration of the object. bold r left parenthesis t right parenthesisr(t)equals=left angle 6 t superscript 4 baseline comma 2 t cubed right angle6t4,2t3 for tgreater than or equals≥0