Vector Calaculus

Given the vector function

V = {-y/[(x-4)^2+y^2)]^3/2 + (x+4)/[(x+4)^2+y^2)]^3/2}*xhat

   +{(x-4)/[(x-4)^2+y^2)]^3/2 + y/[(x+4)^2+y^2)]^3/2}*yhat


a) What is the divergence at (-4,0)

b) What is the curl at (4,0)

Note: Y you might want to use maple or some other program   your choice

also the answer shows curl at (4,0) and divergence at (-4,0)(I think)

C