[填空题]
The quadrilateral ABCD has side lengths AB =17 cm, Bew7z y01gaof8 C = 12cm, and C5)jqqcgu 5rk6 D = 11cm. The size of aqku5 qgjr5)6cngle $\mathrm{A}\hat{\mathrm{D}}\mathrm{C}$ 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 $\mathrm{A}\hat{\mathrm{B}}\mathrm{C}$. $^{\circ}$
