Write programs that read a line of input as a string and print a. Only the uppercase letters in the string. b. Every second letter of the string c. The string, with all vowels replaced by an underscore. d. The number of vowels in the string. e. The positions of all vowels in the string. Consider the fragment String stxiaa in nextlineO String ah Gadsi Initialize a.b.sde Print out the result. (string) i Syst (b) i (c)