Create a function called decrypt$($raw$\_$dna$).$ This function should do the following:

Parse the raw DNA provided in the parameter to create a new valid DNA sequence that contains ONLY the nucleotides: A$,$ C$,$ G$,$ and T in uppercase format. Please note that nucleotides that are not in uppercase format should not be included in the valid sequence.

Return the newly created valid DNA sequence.

Create a function called process$($valid$\_$dna$).$ This function should do the following:

Count the occurrence of each nucleotide $($A$,$ C$,$ G$,$ T$)$ in the valid DNA sequence provided in the parameter.

Construct a list with the counts of A$,$ C$,$ G$,$ and T in that specific order.

Return the list.

Add the following code to the main function to test your functions: