Change from rectangular to spherical coordinates. (let ρ ≥ 0, 0 ≤ θ ≤ 2π, and 0 ≤ ϕ ≤ π.)

[Dhanalakshmi]

Change from rectangular to spherical coordinates. (Let ρ ≥0, 0 ≤ θ ≤ 2π , and 0 ≤ ϕ ≤ π)
a) ( 0,− 4,0 )
b) ( 1,− 1,−√ 2 )