Answer
$\frac{5}{256}$
Work Step by Step
These events are independent. There are $16$ equally sized fields: $4$ are yellow and green, $3$ are blue, and $5$ are red.
Hence $P(\text{green, then red, then yellow})=P(green)P(red)P(yellow)=\frac{4}{16}\frac{5}{16}\frac{4}{16}=\frac{5}{256}$