Photoproduction of $${\varvec{\pi }}^{{\varvec{-}}}{\varvec{\varDelta }}^{{\varvec{++}}}$$π-Δ++, $${\varvec{\pi }}^{{\varvec{+}}}{\varvec{\varDelta }}^\mathbf{0 }$$π+Δ0, and $${\varvec{\pi }}^{{\varvec{+}}}{} \mathbf{n}$$π+n on the Proton at $${\varvec{E}}_{{\varvec{\gamma }}}=\mathbf{1.5}$$Eγ=1.5–3