Please help. I need to implement a mortgage calculator via web-app. Based on the data entered, compute and show the amortization table and the amount of money saved by extra payments. Mortgage data should include: customer name, name of this mortgage configuration (e.g. smaller down-payment), mortgage amount, down-payment amount or percentage, interest rate, loan duration (10/15/20/30 years), any additional payments per month, any additional payments per year. In case of additional principal payments, the tool should display the amount of interest saved over the life of the loan and how many months (or years) those extra payments will shave off the total life of the loan (see associated screenshots). Bonus: the calculator should have ability to compare at least 2 different mortgages and view data visualization. Any programming language is accepted. Thank you