[填空题]
The quadrilateral ABCD has side lengths AB =17 cm, BC = 12cm, anx*b qqw 9u3ana/uh8* nd CD = 11cm.kpw7oc4/j(4 hoh6 ly+xlx7q-eq k/er The sl x4/c-k(6o/jqqry e7l4w 7+phoekh x 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 $\mathrm{A}\hat{\mathrm{B}}\mathrm{C}$. $^{\circ}$
