Low-energy lightbulbs typically cost $3.95, have a life of nine years, and use about $2.05 of electricity a year. Conventional lightbulbs are cheaper to buy, for they cost only $.59. On the other hand, they last only about a year and use about $7.05 of energy a. If the real discount rate s 6%, what is the equvalent annual cost of the two products? Do not round intermediate calculations. Enter your answers as a positive value rounded to 2 decimal places. Equivalent Annual Cost Low-energy lightbulbs Conventional lightbulbs b. Which product is cheaper to use? O Low-energy lightbulbs OConventional lightbulbs