The assignment driving me crazy

[hiddenjr]

Guys, Can you loot at these questions? This is the assignment but it is too hard to solve. Please look at attached file..

 

[ppyadof]

What parts are causing you trouble? Also, please post your attempt.
By the way, is this really calculus?

 

[hiddenjr]

Actually I don't know every part. I have know idea how I can start.

 

[radou]

If you were assigned a problem, then you should have some reference related to the very same problem - start with definitions.