Assume that given, middle and family are three variables of type string that have been assigned values. write an expression whose value is a string consisting of the first character of given followed by a period followed by the first character of middle followed by a period followed by the first character of family followed by a period: in other words, the initials of the name. so if the values of these three variables were "john" "fitzgerald" "kennedy", then the expression's value would be "j. f.k.".