please solve it

1. (a) Victoria is considering using solar power for her new house. The solar panel that she is looking into contains four cells and each cell can generate 80 milliWatts per square inch. Assume that all appliances she wants to power with solar electricity are rated 900 Watts in total. The solar panel she is looking into costs around $73 per square feet plus additional costs of $600 for accessories and installation and will last for 6 years. Alternatively, she can purchase from the power grid at 44 cents per 100 Watt-hours per day. [Hintz 1 foot = 12 inches; 1 milliWatt = 1 >