Please provide solutions and steps. Thank you in advance. ( Theory of Interest )

Note: For simple interest and simple discount (consider finding the ratio of the number of days in between the giver dates to the number of days in a year). For compound interests and discounts, you may consider measuring fractional periods of a year, e.g from Jan. 9, 2017 to Oct. 9. 2017 elapsed 9 moths which is 3/4 of a year.

A 20,000 payment was made on January 9, 2017 find the discounted value and accumulated value on the specified date corresponding to the given the rates of interest or discount. date Discounted Value date Accumulated Value Rate of Inter- est or Discount simple dis- count rate of Aug. 11, 2017 Jun. 12, 2017 41% per an- num (ordinary, non-leap year)