Assume we have the following program for some language with C-like syntax. int x, y, z; void foo(a, b, c) {a = a*2; b = b*2; x++; c = c+b;} x = 1; y = 2; z = 3; foo (x, y, z); What are the values of x, y, and z after the call to foo for each of the following cases? a) The formal parameters a, b, and c are all call-by-value? b) The formal parameters a, b, and c are all call-by-reference? c) The formal parameters a, b, and c are all call-by-value/result (i.e. in/out mode in Ada)? d) The formal parameters a, b, and c are all call-by-name