Students were asked to simplify the expression csce-sine Two students' work is given. CSC B Student A Student B Step 1: CSC sine CSC CSC Step 1: sin sine CSC0 sine Step 2: 1- 1 1-sin sine Step 2: sin CSC0 Step 3: cos20 sin20 Step 3: 1 - sin 0 Step 4: cos Step 4: cot Part A: Which student simplified the expression incorrectly? Explain the errors that were made or the formulas that were misused. (5 points) Part B: Complete the student's solution correctly, beginning with the location of the error. (5 points)