Please see question below with finding the probability.

Austin and jenny are at the grand opening celebration of a supermarket. They each spin a wheel with 10 equal-sized slices, as shown below. 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. (a) If the arrow stops on a black or white slice, then Austin wins a gift card. Find the odds against Austin winning a gift card. X ? (b) If the arrow stops on a grey or white slice, then Jenny wins a gift card. Find the odds in favor of Jenny winning a gift card