(a) Write To := V123 in scientific notion up to 4 S.F. (b) Let x be the answer of the above problem. Determine the percent error between the square of the estimation x2 and the original (x0) = 123: 202 - (20 0 ) 2 X 100. (20) 2 (c) Let X = lau and L be the average lunar distance (LD). Consider- ing the possible maximal and minimal values of the relative distance R between the sun and the moon, determine R in both au and km up to 3 S.F. See https ://cneos . jpl . nasa. gov/glossary/au. html and https://cneos . jpl . nasa. gov/glossary/LD. html. (d) Velocity addition formula in $2-1, Figure 2-2, is merely an approximation if a typical velocity is sufficiently smaller than the speed of light. Recall- ing the speed of light in the air is about 3.00 x 10 ms , determine the ratio of the velocity of the train 80km h- and the speed of light. (e) Consider a round-trip; the go-travel is 9kmh- and the back-travel is 18kmh . Determine the average speed. (Hint: the answer is NOT 9+18 ! ) 2