A) M is the midpoint of AB. If the coordinates of A are (−1,5) and the coordinates of M are (3,3), what are the coordinates of B? b) What is the length of the line segment joining point A to point B in part a? (Round to the nearest tenth if necessary)

Reference formula
d = $\sqrt{\left(x_2-x_1\right)^2+\left (y_2-y_1\right)^2}$√(x2−x1)2+(y2−y1 )2

$a^2+b^2=c^2$