For each of the following vector fields F , decide whether it is conservative or not by computing curl F . Type in a potential function f (that is, [math]). If it is not conservative, type N.

A. [math]
[math]

B. [math]
[math]

C. [math]
[math]

D. [math]
[math]

E. [math]
[math]

Note: Your answers should be either expressions of x, y and z (e.g. "3xy + 2yz"), or the letter "N"

Your overall score for this problem is