Determine P(E|F) . A die is thrown three times, E : 4 appears on the third toss, F : 6 and 5 appears respectively on first two tosses

Question

$\begin{array}{1 1} \frac{1}{3} \\ \frac{1}{6} \\ \frac{2}{3} \\ \frac{1}{2} \end{array} $