Continuing with the code from the previous question, assume the runtime stack contains activation records main, r, r,cmp (reading from the bottom of the stack to the top). What are the possible outputs of the program up to this point? [Choose all that apply] orr 0 rrs 0 rrer 0 rrrs rrrss rsrs rsrsr Orrsrsrs O rrrssr Orrssrs class Main inherits IO { s(): Int { { out_string("s"); 1; } }; cmp(x:Int, y:Int): Bool { not(x