Answer:
Angle 3 = 42° because of alternate interior angles theorem
Angle 15 = 62° because of alternate exterior angles theorem
Explanation:
Alternate interior angle theorem: angles that lie on the inner side of the parallel lines but on opposite sides of the transversal
Alternate exterior angle theorem: angles that lie on the outer side of the parallel line but on opposite sides of the transversal
transversal: a line that passes through two lines in the same plane at two distinct points