Add punctuation: Did someone email you a F3D file and youre not sure how to open it Maybe you have found a F3D file on your computer and wondering what its for Windows might tell you that you cant open it or in the worst case you might encounter a F3D file related error message
A: Did someone email you a F3D file and you're not sure how to open it? Maybe you have found a F3D file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a F3D file related error message.

Add punctuation: Carry on straight up the dual carriageway St James Boulevard
A: Carry on straight up the dual carriageway (St James Boulevard).

Add punctuation: Why propose new own resources
A:
Why propose new own resources?