Students were asked to simplify the expression sece -cose Two students' work is given. seco Student A Student B Step 1 Bece cose Bece sece Step 1 cose cose sece COS B Step 2 1 1 1-cos 0 Cos B Step 2: cose sec 8 Step 3:1 - cos. 8 Step 3: sin20 Step 4: sin2 0 cos? 6 Step 4: tan2 0 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)