Please anyone tell how to take range of x and y i got struck there pls help me ..its hampering my further study please help

so the range of x is (0,1), while the range of y is (0,1,2), as explained in the above comment.

range of x is directly written in the question itself. x depends on first toss only. if first toss results in head, x=1, but if first toss results in tail, x=0. But y depends on bo...