Given a right triangle, where one cathetus is \(\displaystyle\overline{{A}}={11}\) m, the hypothenuse is \(\displaystyle\overline{{C}}={15}\) m, and \(\displaystyle\angle{c}={90}^{\circ}\) . Find all missing sides \(\displaystyle{\left(\overline{{B}}\right)}\) and angles \(\displaystyle{\left(\angle{a}{\quad\text{and}\quad}\angle{b}\right)}\).