Orange juice mixture

This task is about the different rates of orange drink powder per volume of water.
Janice was making some orange drink. She made Mixture X by adding 4 tablespoons of orange powder to 2 litres of water, and Mixture Y by adding 6 tablespoons of orange powder to 3 litres of water.
  

Mixture X           

 

Mixture Y            

 

a) Which of these statements is true about Janice's drink mixtures?
   
  (A)
(B)
(C)
(D)
Mixture X had a stronger flavour than Mixture Y.
Mixtures X and Y had the same strength of flavour.
Mixture Y had a stronger flavour than Mixture X.
It is impossible to tell from the information given.
 
b)
Janice wanted to make a new mixture with the same strength of flavour as Mixture X.
If she used 8 litres of water, how many tablespoons of orange powder would she need?
 
__________
 
c)
Janice made another new mixture by adding 5 tablespoons of orange powder to every 2 litres of water.
How many tablespoons of orange powder would she need for 12 litres of water?
 
__________