Andrew is showing his work in simplifying (-5.7+2.2)-1.1

step 1 (3.2-5.7)-1.1
step 2 2.2-(5.7+1.1)
step 3 2.2-(6.8)
step 4 -4.6

which statement is true

in step 1, andrew used the commutative property
in step 2, andrew used the distributive property
in step 3, andrew used the associative property
in step 4, andrew's answer is incorrect