Evalute the integral 0π40π203cos(ϕ)ρ2sin(ϕ)dρ dϕ dθ\displaystyle {\int_{{0}}^{{\frac{{\pi}}{{4}}}}}{\int_{{0}}^{{\frac{\pi}{{2}}}}}{\int_{{0}}^{{{3}{\cos{{\left(\phi\right)}}}}}}\rho^{{2}}{\sin{{\left(\phi\right)}}}\quad{d}\rho\ {d}\phi\ {d}\theta using spherical coordinates.