Equation for these three towers are:

\(\displaystyle{\left({x}+{6}\right)}^{{{2}}}+{\left({y}+{12}\right)}^{{{2}}}={17}^{{{2}}}\)

\(\displaystyle{\left({x}-{11}\right)}^{{{2}}}+{\left({y}-{15}\right)}^{{{2}}}={15}^{{{2}}}\)

\(\displaystyle{\left({x}+{3}\right)}^{{{2}}}+{\left({y}-{15}\right)}^{{{2}}}={13}^{{{2}}}\)