- When the three alloys are melted together in the ratio p:q:r, the ratio of zinc, tin, and copper in the resulting alloy is also p:q:r. Determine the ratio p:q:r
- What is the ratio p:q:r, if keeping all the other conditions unaltered, the ratio of zinc, tin, and copper in the resulting alloy is r:q:p?

__Note__: Assume that each of p, q, and r is a positive integer with gcd(p,q,r)=1