Find the area enclosed by GFDH
ABCD is a rectangle. Points F and H are midpoints of AB and CD respectively. FG is perpendicular to AH, AB = 4 yards, BD is half of AB (with explanation)

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?