ere is a $2-$dimensional plot showing two functions that classify data points into two classes. The red points belong to one class, and the green points belong to another. The dotted blue line $($F$1)$ and dashed pink line $($F$2)$ represent the two trained functions.

$1$ point

Which of the two functions overfit the training data?

Both functions F$1$ & F$2$

Function F$1$

Function F$2$

None of them