Two average forces. A steady stream of $0\mathrm{.}317$ kg snowballs is shot perpendicularly into a wall at a speed of $4\mathrm{.}20\frac{m}{s}.$ Each ball sticks to the wall. The figure gives the magnitude $F$ of the force on the wall as a function of time $t$ for two of the snowball impacts. Impacts occur with a repetition time interval $t_r=54\mathrm{.}0ms,$ last a duration time interval $t_d=14\mathrm{.}0ms,$ and produce isosceles triangles on the graph, with each impact reaching a force maximum $F_{\text{m}\text{a}\text{x}}=190N.$During each impact, what are the magnitudes of $($a$)$ the impulse and $($b$)$ the average force on the wall? $($c$)$ During a time interval of many impacts, what is the magnitude of the average force on the wall?