7) A student group postulates that the stride length, L, of a marathon runner is proportional to a runner’s inseam, H, and inversely proportional to the square of a runner’s weight, W. The inseam length is to be measured using a tape measure and the weight using a scale. The estimated uncertainties for H and W are 6% and 5% respectively, based upon a typical inseam of 70 cm and a weight of 600N. Determine the fractional uncertainty in L