solve following contractor's problem.
(a) A contractor is building an office complex and needs to plan for water and electricity demand(sizes of pipes, conduit, and wires). After consulting with prospective tenants and examining historical data, the contractor decides that the demand for electricity will range somewhere between 1 million and 150 million kilowatt-hours per day and water demand will be between 4 and 200(in thousands of gallons per day). All combinations of electrical and water demand are considered possible. Draw the sample space of this experiment. And express the sample space as the set of ordered pairs(x: demand for water, y: demand for electricity)
(b) Suppose that the probability is distributed uniformly (proportional to the area). And let’s define water demand more than 100 high demand in water and electricity demand more and 115 high demand in electricity. What is the probability of high demand in water, high demand in electricity, high demand in both water and electricity?