10. A computer call center is going to replace all of its incandescent lamps with more energy - efficientfluorescent lighting fixtures . The total energy savings are estimated to be $1 , 875 per year , and the costof purchasing and installing the fluorescent fixtures is $4900 . The study period is 5 years , and terminalmarket values for the fixtures are negligible . The simple payback period of the investment is :"a )2 years( b )3 Years(C )4 years5 vears