Dave and Elien dre newly martled and iving in their first house The vearly premum on theur homeowners insurance policy is $150 for the coverage they need. Their insurance company offers an arnual discount of 7 percent if they instas dead-boit locis on all exterior doors. The couple can also receive an annoal discount of 4 percent if they install smoke detectors on each floor. They have contacted a locksmath, who will provide and install dead bolt locks on the fwo exterior doors for $55 each At the iocal harclwate store, smoke detectors cost $10 eoch, and the new thouse fas fwo floors. Dave and Ellon can install the smoke detectoes themivelves a. What discount will Dive and Ellen recelve if they unstali the dead-boit locks? (Round your onswer to 2 decimst pleces) b. What discount will Dave and Ellen receive if they install smoke detectors