You have a two-wheel trailer that you pull behind your ATV. Two children with a combined mass of 78.2 kg hop on board for a ride through the woods and the springs (one for each wheel) each compress by 5.37 cm. When you pull the trailer over a tree root in the trail, it oscillates with a period of 1.99 s. Determine the following.

(b) mass of the trailer N/m (c) frequency of the oscillation Hz (d) time it takes for the trailer to bounce up and down 10 times