I WILL GIVE BRAINLIEST PLEASE HELP FULLY (pt 4) 4. Bianca has a choice between three savings accounts. Savings account A has an APR of 3.9998%, compounded semiannually; savings account B has an APR of 3.9742%, compounded monthly; and savings account C has an APR of 3.9886%, compounded quarterly. Bianca wants to choose the savings account with the highest APY. (5 points: Part I – 1 point; Part II – 1 point; Part III – 1 point; Part IV – 1 point; Part V – 1 point)
Part I: If r is a savings account's APR and n is the number of compounding periods per year, what expression gives the savings account's APY?

Part II: What is the APY of savings account A to 4 decimal places?

Part III: What is the APY of savings account B to 4 decimal places?

Part IV: What is the APY of savings account C to 4 decimal places?

Part V: Which savings account offers the highest APY?