(Power and Energy) If electricity costs $0.09 per kilowatt hour, find the cost (in dollars) of running each of the following ele
ctrical devices six hours per day for 30 days: a. A 60 watt incandescent light bulb
b. An LED light bulb that emits the same light intensity as a 60 W incandescent light bulb, but uses 80 mA from a 120 V residential power wall outlet
c. A 1500 W electric space heater that runs continuously over the six-hour daily period
