Complete the two-column proof.

given: < 2 = < 4, m< 2 = 110
proof: m< 3 = 70

< 2 = < 4, m< 2 = 110 given
m< 2 = m< 4 definition of congruent angles
m< 4 = 110
< 3 and < 4 are a linear pair definition of a linear pair(shown in diagram)
< 3 and < 4 are supplementary linear pair postulate
m< 3 + m< 4 = 180
m< 3 = 70