(a)[3]
Describe fully the single transformation that takes triangle $A$ onto triangle $B$.
(b)[2]
Transformation $P$ is given by the matrix $\begin{pmatrix}-\frac{1}{2} & 0\\0 & -\frac{1}{2}\end{pmatrix}$. $P$ takes triangle $A$ to triangle $C$. On the grid, sketch triangle $C$.