Let us consider a multi-stage rocket such that each engine is powerful enough to obtain - 30 percent of the speed of light - as the final speed relative to its previous stage. = be the (iii) Let uo = 0 be the speed of the stationary launch site, and u speed of the first stage. Use the above addition formula iteratively, show u2, uz and u4, using rational numbers. = n v +u vu' 1+1/2 (iv) (Optional) Find the smallest stage to obtain more than 90 percent of the speed of light. What if 99 percent?