Please help answer the highlighted questions (7and 8).

B EN Sa + 0.57% - 0.43% $0.43% + 0.78% collision 1 collision 2 collision 3 collision 4 t (s ) 3.585 5.615 9.695 tz (s) 7.635 3. 695 5.725 7. 765 9.825 - At (s) O.1/s 0. 115 10- 135 0. 135 - X1 (cm) 74 cm 73 cm 74cm 74 CM . Xmax (cm) 76cm 76cm 36Em . 46 max (cm) -3cm -3cm - 2cm - 2 cm . 46 max (m) - 0.63m -0,03m -0.02 m 1 0.02m v1 (m/s ) 0.70 m/s | |0.72 m/s| 0. 7am/s|0.68m/s U2 (m / s ) 0.64 m/s |0.63 m/s|- 0.65 m/s - 0.65 m/s amax (m/s2) - 13.4m/52 - 16.5 m/5 - 15. 8m/5 - 14.8 m/s - Sa(m/s2) +0.59% 10.43%+ 0.43% +0.78% m (kg) 258. 769 258.769 258. 769 258, 769 spring k (N/m) 132. 94 141 9 - 203.82 190. 92 Constant Kava (N/m) ( 167 . 27 + 0. 05 )N/m . AP(kgm/s) -346. 73 -349. 32 - 359.50 - 349.15 Favg = AP (N) -3152. 09 - 3175.69 -2726. 92 - 2647.30 Table 1. Collision Data 6. Calculate the momentum change (Eq.2) during each collision and hence the average force given by: Favg = (5 ) 7. Select one of the four collisions. Using the calculated average value of the spring constant calculate the spring force (collision force) in the time interval t, S t S t2 An easy way to do this is to copy the position vs time data during the collision time in an Excel file and then calculate the compression of the spring as a function of time. 8. Make a plot of the spring force as a function of time. What does the area under graph represent? Try to estimate the area under graph Questions ( 1 . Using your data investigate whether the collisions are elastic. In order to do so calculate the % of the initial kinetic energy lost in each of the four collisions. Collision Force collision ( 1 ) Fel = - K. DI = - 132.49. - 3 = 397.32