please help solve this question

Problem #8: Suppose a particle is moving on a path with a constant speed, where speed is dened as norm of velocity. [4 marks] (a) Find 1" ' r" where where I" and r" are the velocity and the acceleration of the particle, respectively. (b) If velocity of the particle at 1' = to, is given by r130) = (3, 9'). Then which of the following is the acceleration of the particle at t = to? - |:| Enter your answer \"mm\" pmb'em #8(a). as in these examples (mm9) (3H5, 13) ((3)0953) (ma9) Problem #B(b}