Fred's Apple Orchard and Fruit Market is a medium-sized orchard. They have several buildings located around their property. Some are old brick and stone buildings that have been around for over one hundred years. Several are wooden barns and storage facilities. There are also a few newer buildings that are pre-fabricated buildings with sheet metal walls and support structures. In addition to the buildings themselves there are, of course, lots of fruit trees all over the property. Fred wants your company, Awesome Networks, Inc., to install a wireless network to connect his buildings together. The purpose of the wireless network is to connect point-of-sale terminals, PCs and printers to the main building and the internet. There are different issues that can interfere with wireless signals. Name at TWO or more of them AND explain how Fred's property and buildings could cause problems for a wireless network.