5. The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. a. A kWh is a unit of energy it is one kilo-Watt* one hour. What is a kWh in Joules? At this unit price, calculate the cost that would result from each of the following: b. Leaving a 80.0 W porch light on for 2 weeks while you are on vacation c. Making a piece of dark toast in 3.00 min with a 890 W toaster. d. Drying a load of clothes in 40.0 min in a 4900 W dryer