Izzie is trying to solve this inequality. After she solves it, she shows it to you, and she asks you if she did it correctly. This is the work she completed:

3(t+1)−4t≥−5
Step 1: 3t +3−4t≥−5
Step 2: −t+3≥−5
Step 3: −t≥−8
Step 4: t≥8


Part A: In which step did Izzie make a mistake?

Part B: How would you explain to Izzie what her mistake was, so she won't make the mistake again on a future test?