Part A: Decision Boundaries

$[10$ points$]$

Following polynomials form the decision boundaries of a classifier.

$x^4-4x^3-2x^2+12x-3$

$x^5-4x^3-2x^2+12x-3$

You are provided with table of test points, You have to figure out which points belong to class

A$.$ Once you have figured out the result $,$ write the answer in the third column below. Hint: Point

$(0,0)$ belongs to class $A.$

$(-1,1)$

$1,-1$

$-2,25$

$1,5$

$-2,5$