Question 4 Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second exerts a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. a. Calculate the acceleration. b. What would the acceleration be if friction were 15.0 N? Use the editor to format your