Solve part A to D using basic python only if and else and elif dont use while loop or any advanced coding only else and if and please write on top the question letter.

.. p3.28 Roman numbers. Write a program that converts a positive integer into the Roman number system. The Roman number system has digits I 1 V 5 X 10 L 50 C 100 D 500 M 1,000 Numbers are formed according to the following rules. a. Only numbers up to 3,999 are represented. b. As in the decimal system, the thousands, hundreds, tens, and ones are expressed separately. c. The numbers 1 to 9 are expressed as IIIIIIIVVVIVII7VIII8IX1234569 As you can see, an I preceding a V or X is subtracted from the value, and you can never have more than three I's in a row. d. Tens and hundreds are done the same way, except that the letters X, L, C and C, D, M are used instead of I,V,X, respectively. Your program should take an input, such as 1978, and convert it to Roman numerals, MCMLXXV