Need help fast!

Amy (180 lbs) and Rachel (90 lbs) are standing on slippery ice and push off each other. If Amy slides at 5 m/s, what speed (meaning, don't worry about the direction or sign) does Rachel have? Hint 1: Don't worry about converting the weights of Amy and Rachel to kilograms here. Think - the ratio of weights is the same as the ratio of masses (weight is therefore in a ratio of weights, the "'s" cancel out). Please give your answer in units of m/s, however, do not explicitly include units when typing your answer into the answer box. Including actual units will result in your answer being incorrectly scored