Hi! I'm not sure what I did wrong. I followed the formula I=mr^2 but apparently my answer is incorrect. So for Part A, I did:

I= (1.4x0.50^2)+(1.4x1.50^2)+(4.5x0.50^2)+(4.5x1.50^2) = 14.875. I rounded it to 15 kgm^2 since the question asks for two sig figs but apparently it was wrong?

Problem 8.39 R Assume 1.4 kg , 4.5 kg , and the objects are wired together by very light, rigid pieces of wire. The array is Part A rectangular and is split through the middle by the ac axis. Calculate the moment of inertia of the array of point objects shown in the figure(Figure 1) about the y axis. Express your answer to two significant figures and include the appropriate units. Figure