A uniform spring whose unstretched length is l has a force constant k. the spring is cut into two pieces of unstretched lengths `l_(1)` and `l_(2)`, where `l_(1)=nl_(2)` and n is an integer. What are the corresponding force constant `k_(1)` and `k_(2)` in terms of n and k? what is the ratio `k_(1)//k_(2)`