A jogger can run 4 laps around the block in 8 minutes. If the jogger runs at a constant rate of speed, how many laps can the they run in 30 minutes?

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?