Write a function called DNAcomplement that consumes a set of letters as a character array that forms a DNA sequence such as gattaca. The function will produce the complement of the sequence so that the as become ts, gs become cs, and vice versa. The string gattaca would therefore befome ctaatgt. You may assume that all the letters in the sequence will be lowercase and that they will all be either a, t, g, or c. Note: You may be tempted to use iteration for this problem, but you dont need it.