(a(i))[3]
Find the value of $|\vec{OB}|$.
(a(ii))[2]
Find the vector $\vec{BC}$.
(b)[2]
Find $\vec{QX}$ using $\mathbf{a}$ and $\mathbf{b}$. Give your answer in its simplest form.
(c(i))[2]
Calculate the value of $M^2$.
(c(ii))[2]
Calculate the inverse $M^{-1}$.