[填空题]
The quadrilateral ABC sm hpmo5ig lo1j9* n dz3o+j(yfs6b(2D8i t5 cz9tgms g5lzg0ho*k0p 7 has side lengths AB =17 cm, BC = 12cm, and CD = 11cm. The scggz5zp80 *s05om7kti9 hg tl ize of angle $\mathrm{A}\hat{\mathrm{D}}\mathrm{C}$ is $105{\circ}$ and the size of angle $\mathrm{C}\hat{\mathrm{A}}\mathrm{D}$ is $25^{\circ}$.
1.Find the length of AC in centimetres. cm
2.Find the size of angle $\mathrm{A}\hat{\mathrm{B}}\mathrm{C}$. $^{\circ}$
