Natalie made a mistake in the following problem.

Natalie made a mistake in the following problem. What line was the mistake made in? Show your work and give the correct answer.

Line 1 6(4) ÷ 2 − 1 + 5
Line 2 6(4) ÷ 1 + 5
Line 3 24 ÷ 1 + 5
Line 4 24 + 5
Line 5 29