Consider the following. r(t)=(3t)i+(6t5)j+5tk,P(2,1,5) (a) Find the arc length function s(t) for the curve measured from the point P in the direction of increasing t. s(t)= Reparametrize the curve with respect to arc length starting from P. (Enter your answer in terms of s.) r(t(s))=[262s[622s+1,625s+5] (b) Find the point 9 units along the curve (in the direction of increasing t ) from P. (x,y,z)=(3629,1+6218,5+6245)x)