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]

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