App crashing after adding a ScrollView and ImageView-Collection of common programming errors

I added a scroll element to the main activity of my application along with an ImageView but when I ran the project on an emulator it crashes giving me errors stemming from the main activity.The error log is a follows: http://pastebin.com/PAYrjHCL

So from going through the errors I found that it was a problem in the main activity.But I don’t see where I have gone wrong as I only added these two features.Can anyone spot whats wrong in this activity thats causing it to crash?

My main_activity is like this: