$21 I believe (it's 1 am where I am so I'm not 100% sure but I think it's correct)
I believe it’s 12. But I’m not sure
You would have to make a point at 6/3 and go down one and to the left 7... then your answer would be -1/2 sooo D=-1 hope this helps
If the axis is x then you go to y so (6, 5)