Show that if F(ρ,θ,φ)=f(ρ)g(θ)h(φ) is a continuous function on the spherical box \(B = \big\{(\rho,\theta,\varphi)\, | \,a \leq \rho \leq b, \space \alpha \leq \the...Show that if F(ρ,θ,φ)=f(ρ)g(θ)h(φ) is a continuous function on the spherical box B={(ρ,θ,φ)|a≤ρ≤b,α≤θ≤β,γ≤φ≤ψ}, then ∭