Need help with part b and c thanks

AU BEILEINHW BUSHI WALL. 11 17/LVLJ U.VV.VV III -- Due Date: 1/4//2045 11:59:00 PM End Date: 1/28/2043 11:54:00 PM (0%) Problem 10: A 20-kg child slides down a playground slide with a constant acceleration of a = 1.6 m/s parallel to the surface of the slide. The child starts sliding with an initial speed of vo. Refer to the figure. Vo Othee 33% Part (a) Enter an expression for the child's speed squared, vy, at the bottom of the slide in terms of a, vo, and the length of the slide, vi = vo2+ 2ad Correct! *33% Part (b) If the slide is 4.0 m long and the child's final speed is vy = 5.0 m/s, what is their initial speed, in meters per second? VO, max = Grade Deducti Potentia sin() COs() tan() IT ( ) 7 8 9 HOME Submis cotan( asin() acos() E 1 1 4 5 6 Attemp (0% p atan() acotan() sinh() 1 2 3 detailed cosh( tanh() cotanh() + 1 0 END 2 Degrees O Radians VO BACKSPACE DEL. CLEAR (0%) Problem 10: A 20-kg child slides down a playground slide with a constant acceleration of a = 1.6 m/s2 parallel to the surface of the slide. The child starts sliding with an initial speed of vo- Refer to the figure. theexpertta.com 33% Part (a) Enter an expression for the child's speed squared, vy, at the bottom of the slide in terms of a, vo, and the length of the slide, d. =vo2+ 2ad Correct! * 33% Part (b) If the slide is 4.0 m long and the child's final speed is vy = 5.0 m/s, what is their initial speed, in meters per second? VO, max = 10.00 X Attempts Remain * 33% Part (c) When starting from rest, how long, in seconds, does it take the child to reach the bottom of the slide? At = 1 Grade Summary Deductions 0% Potential 100% sin() cos() tan() JE ( ) 7 8 9 HOME Submissions cotan() asin( acos() E 1 41 4 5 6 Attempts remaining: 5 atan() acotan() sinh( 1 2 3 (0% per attempt) detailed view cosh( tanh() cotanh() + - 0 0% Degrees O Radians VO BACKSPACE CLEAR 0% W N