An object moves along the $y$ axis (marked in feet) so that its position at time $x$ (in seconds) is given by the function $$f(x) = x^3 - 15 x^2 + 27 x.$$ Find each of the following:

(A) The instantaneous velocity $v = f'(x)$. $v$ =

(B) The velocity when $x = 2$ and $x = 10$ seconds (include units).
Velocity at $x = 2$:
Velocity at $x = 10$:

(C) List all values of $x$ when $v = 0$.
Values of $x$ =