I need help with these simple interest questions.

Using the simple interest formula I = Prt, compute the amount of interest earned for $3136.00 at 67% for 47 years. The interest earned is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)On September 6, 2017, Leah deposited $477.00 into a savings account that earned simple interest of 0.53%. How much interest was earned and paid into Leah's account on March 5, 2018? The interest earned was $. (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)Using the simple interest formula, determine the number of months until $1042.00 will earn $50.49 interest at 33% p.a. The number of months required is D. (Round up the nal answer to: the nearest month as needed. Round all intermediate values to six decimal places as needed.)