Jillian is using integer tiles to add 7 + (negative 2). She uses the steps below. Step 1 7 positive tiles.
Step 2 7 positive tiles and 2 negative tiles.
Step 3
7 positive tiles and 2 negative tiles. 2 positive and 2 negative tiles are circled.
Step 4
7 + (negative 2) = 2

Jillian has made an error. In which step does it occur?