Can someone please help me answer Q2 and Q3 like the example down below. Also explain how you got to the answer. Please help

thanks

Time Distanc Distanc Distanc Distanc Distanc Y Q Precisio to2(tim (s) ey1 e y2 e y3 e y4 e y5 (Averag (standa n e (m) (m) (m) (m) (m) e dista rd square nce) deviati d) on) 0 0 0 0 0 0 0 0 0 0 0.5 1.3 1.19 1.27 1.23 1.4 1.28 0.08 6.25 0.25 0.75 2.92 2.68 2.9 2.62 3.2 2.86 0.23 8.01 0.56 1 5.2 4.77 5.07 4.95 5.09 5.02 0.16 3.26 1 1.25 8.08 7.43 7.79 7.76 8.28 7.87 0.33 4.14 1.56 1.5 11.77 10.55 11.12 12.33 12.62 11.68 0.85 7,30 2.25