For this problem we consider ϕ1,0,0​(x,y,z)=C1​e−rho,ϕ2,0,0​(x,y,z)=C2​(2−rho)e−2rho​,ϕ2,1,0​(x,y,z)=C3​rhocos(θ)e−2rho​,​ where rho,φ,θ correspond to the spherical coordinates, as defined in Section 15.8. Those three functions are all real functions. The probability to find the electron at a point (x,y,z) is given through fn,l,m​(x,y,z)=∣ϕn,l,m​(x,y,z)∣2. (a) The probability to find the electron somewhere in space must be one, thus ∭R3​fn,l,m​(x,y,z)dV=1. Use that equation to determine C1​.