In order to get the most accurate readings the devices has to be placed one-third of the distance between the device and the top off the antenna. The depth is 18.5 feet. The health off the antenna will be 21.5 feet above the water at mean tide.

Solution: beginning of the unit = - 2end of the unit = beginning of the unit + 4end of the unit = - 2 + 4end of the unit = 2final answer: therefore, aila was able to reach 2 ( insert name of unit of measurement ) at the end of the unit.hope this ! : )have a lovely day! < 3