Nathan has nickels, dimes, and quarters in the ratio of 1 : 4 : 3. If 51 of Nathan's coins are quarters, how many nickels and dimes does Nathan have?

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?