3) In 2035, the energy consumption of all the people on our planet is estimated to be 2.2 x 1014 kWh per year (1 kWh = 1000 J/s * 3600 s = 3,600,000 J). We need to consider how to move to clean renewable energy to meet these demands. One option is solar power. Solar panels convert light energy from the sun into electrical energy. The power from the sun shining on the Earth is 1.2 kW/m2 . a) How big an area do we need to cover with solar panels (that are 25% efficient) to meet the energy needs of the world in year 2035?. We would build it in the sunniest place on earth that gets 4000 hours per year of sun. b) From your answer for the area, ifthe solar panels covered an area that was in the shape of a square, what would the length of one of its sides be