Emerson is making a punch that contains 60% grape juice and the rest lemon-lime soda. the punch has 2 liters of lemon-lime soda. part a: write an equation using one variable that can be used to find the total number of liters of grape juice and lemon-lime soda in the punch. define the variable used in the equation. (5 points) part b: how many liters of grape juice are present in the punch? show your work.