The Chartered Financial Analyst $($CFA$)$ designation is the de facto professional certification for the financial industry. Employers encourage their prospective employees to complete the CFA exam. Daniella Campos, an HR manager at SolidRock Investment, is reviewing $10$ job applications. Given the low pass rate for CFA Level $1,$ Daniella wants to know whether or not the $10$ prospective employees will be able to pass the CFA Level $1$ exam. Historically, the pass rate is higher for those with work experience and a good GPA in college. With this insight, she compiles the accompanying data file with information on $63$ current employees who took the CFA Level I exam last year, including the employee$$s success on the exam $(1$ for pass, $0$ for fail$),$ the employee$$s college GPA, and years of work experience.

a$.$ Perform KNN analysis to estimate a classification model for the CFA Level $1$ exam using the CFA$\_$Data worksheet and score the $10$ job applicants in the CFA$\_$Score worksheet. What are the misclassification rates for k $=3,4,$ and $5?$

Note: Report your answer in percentage. Round your answers to $2$ decimal places.