HELPPP PLEASEE!!!!
Lydia evaluated the expression 14+15-y^2 / 5 when y=10, as shown.

Given 14+15-y^2/5
Step 1. 14+15-10^2/5
Step 2. 14 + 15 - 20 / 5
Step 3. 14+15-4
Step 4. 29-4
Step 5. 15

This item has two parts.

Part A. Lydia made an error in her calculation. In which step did Lydia make an error?
A. step 2
B. step 3
C. step 4
D. step 5

Part B. What is the correct value of the evaluated expression