A health food store sells seasoning blends in bulk. one blend contains 20% basil

1.a health food store sells seasoning blends in bulk. one blend contains 20% basil. sheila wants to add pure basil to some 20% to make 16 oz of her own 30%. let b represent the amount needed to make the 30%
2. how many ounces of basil are needed for 30% 3. how many oz of 20% are needed. 200 gold reward