Q$20.$ Here is an example of a regression task with the

gradient$-$boosting method. We use a sequence of decision trees

with a learning rate equal to $0\mathrm{.}1.$ The average of target variable $y$

is $84.$ The first decision tree is as :

The second decision tree is as:

What is the predicted value of $y$ for your new observation:

Gender: Female

Color: Red

Weight: $77|$