I'm new to ipad, been a PC user for 20 years. There a a couple of questions I have that I am sure will seem quite elementry for most of you but I can't seem to find specific reference to these questions anywhere. 1) when you open an app does it stay open for ever?? I see no way to close an app (such as the "x" in the upper right on a PC). 2) whenever I power up my ipad I have to go into settings and reconnect to my home wifi every time. why does it not automatically connect when I start the iPad?