hey guys need help with these problems. thanks

Evaluate the given integral:

surface integral xz dS over S where S is the triangle with vertices (1,0,0),(0,1,0), and (0,0,1)

and

Evaluate the surface integral F dot dS for the given vector field F and the given orientated surface S. In other words find the flux of F across S. For closed surfaces use the positive (outward) orientation F(x,y,z)= -y+xi+3zj; S is the hemisphere z=sqrt(16-x^2-y^2)k