2. Write an HTML document that looks similar to Loan Calculatorx (- ) Lg file:///C:/Users/rab29/Dropbox/books/handbooi Qi Loan Calculator Amount borrowed (principal) Annual interest rate (example: .065) Number of years Payments per year 80000 0.05 30 Compute payment Number of payments paid to date $429.46 180 $54306.40 Compute payoff amount Reset Write four functions with these headers: function doPayment() function doBalance() function computePayment(principal, annualRate, years, periodsPerYear) function computeBalance(principal, annualRate, years, periodsPerYear, numberOf PaymentsPaidToDate) The first two functions (doPayment and doBalance) a. take no parameters b. are called from an onclick attribute C. get input from the user d. call the computePayment or the computeBalance function e. display a result to the user The computePayment function computes and returns the monthly payment for a loan with a fixed annual interest rate. The formula for computing a loan payment is ar where p is the payment per period, a is the loan amount, r is the interest rate per period, and n is the total number ojf periods throughout the life of the loan The computeBalance function computes and returns the balance for a loan with a fixed annual interest rate. The formula for computing the balance of a loan after n payments have been made is np(+-1) b-a1+r) where b is the balance or payoff amount, a is the loan amount, r is the interest rate per period, p is the payment per period, and n is the number of payments paid to date