Can you please explain how to solve the third and forth problem in detail? Thanks

In ( u ) Using your graphing calculator to evaluate & graph derivatives. particles position along a horizontal line is epresented by s(t)= 3In(x2)+ cos(2) rite the equation for the velocity function. V (t) V (t) X 2 2x - sin ( 3*) . 3 hat is the velocity at time t=3? V ( ) =_3 ** PRACTICE USING YOUR CALC** 132 2( 3) 7 5m V ( 3 ) = 3. 466 uring the first 10 seconds how many times does the particle stop? disp = s(o) - so) 3 In ( 10 2 ) + cos ( 3 ( 10 ) V ( t) : 0-3 times 2 t t = 4, is the particle speeding up or slowing down? Slowing down