Jim is at the grand opening celebration of a supermarket. He spins a wheel with 10 equal-sized slices, as shown below. The wheel has 7 black slices, 2 grey slices, and 1 white slice. When the wheel is spun, the arrow stops on a slice at random. If the arrow stops on the border of two slices, the wheel is spun again.

If the arrow stops on a black slice, then Jim wins a gift card. Find the odds in favor of Jim winning a gift card.

If the arrow stops on a black slice, then Jim wins a gift card. Find the odds against Jim winning a gift card.