mainly need help with parts 3 and 4 of this problem as i was able to figure out 1 and 2 easily

1. Compute the return on investment for each division 2. Compute the residual income for each division Assume each division is presented with an investment opportunity that would yield a 15% rate of return. 3. If performance is being measured by ROI, which division or divisions will likely accept the opportunity? 4. If performance is being measured by residual income, which division or divisions will likely accept the opportunity