3. Tharindu Kumara is looking for a savings account to temporarily store money from his family business while he learns more about longer term investment options. The account he is considering is a plan through Citibank that offers 1.844% monthly a Write down the compound interest model for the Citibank account b. Calculate the effective rate (APY) of the account in (a). c. How long would he have to leave $10,000 in the account for it to gain $150 in interest? d. He looks at accounts for purely online banks, whose customer service he finds annoying. He decides to put the money in an online bank account if he could get $30 more interest in the first year for the $10,000 mentioned in part (C). What monthly nominal interest rate would he want from an online bank before considering it