So h of three is four. So now we just have to figure out g prime of four. Well lucky for us, they have given us, when x is equal to four, g prime, g prime is equal to 1 1 2. So g prime of four is equal to 1 1 2. So h prime of three is equal to one over 1 1 2. So one over 1 1 2. One divided by 1 1 2 is the same thing as one times two.