Hi, I don't get the right answer for this question. I don't see where I'm going wrong. I use this equation to get the engine rpm for each gear ratio: engine speed (rpm) = gear ratio X final drive ratio X vehicle speed X 60 / (2*pi*rolling radius) So for first gear I get an engine rpm of 8880rpm Second gear = 5190rpm Third gear = 3414rpm Fourth gear = 2500rpm So my answer to is that gear 2 and gear 3 fulfill the conditions. However the answer says its gear 4. Any thoughts as to what I'm missing? Thanks.