$5.$ Draw an arithmetic expression tree that has four external nodes, storing the numbers $2,5,6,$ and $9($with each number stored in a distinct external node, but not necessarily in this order$),$ and has three internal nodes, each storing an operator from the set $\{+,,\backslash$times $,/\}$ so that the value of the root is $27.$ The operators may return and act on fractions, and an operator may be used more than once.