Can someone help me with this problem?? and differentiate if p is pi?

Find the surface area of the paraboloid z = x^2 + y^2 below the plane z = 10 .

I think p ='s pi but I'm not sure

possible solutions....

a. (p/6)(5^3/2 - 1)

b. (13p)/3

c. ( p/6)(13^3/2 - 1)

d. (p/6)(17^3/2 - 1)

e. (p/6) (21^3/2 - 1)

f. (62p/3)

g. (p/6) (29^3/2 - 1)

h. (p/6) (33^3/2 - 1)

i. (p/6) (37^3/2 - 1)

j. none of these