b) Ned has a proposal to develop a new technology where elderly people will lease a device they wear around their necks for $10/month. The device transmits the location of the elderly person to receivers fitted around the person's house and in the garden. The receivers transmit the person's location to a PC that executes a program to detect whether the person has fallen. If the PC algorithm determines the person has fallen, the program calls the next of kin, and if no answer, the ambulance. Ned believes that it will cost him $500,000 to develop the technology and that he will be able to offer investors a return on investment (ROI) of 50%. Describe assumptions Ned must make in order to achieve this ROI. Make your calculations