Calculator.java 18 19 public class Calculator { 20 private static Scanner scanner - new Scanner(System.in); 21 22 // TODO: write printOptions method 23 24 private static void splashScreen() { 25 // TODO 26 27 } 28 29 private static double add(double numi, double num2) { 30 double run; 31 rtn-numl num2; 32 return ren; // is there a simpler way to do this? Maybe even keep it one line 33 34 35 private static double subtract(double numi, double num2) { 36 Develop mode Submit mode Run your program as often as you'd like, before submittir input values in the first box, then click Run program and a second box Predefine program input (optional) MacBook Pro F2 20 F3 ODO F5 F7 F8 # %