Easton simplified the expression (x^2 y^6 z^5)(x^4 y^5 z^3)if he writes his answer in the form of (x^a y^b z^c) what is the value of b the exponent on y pls explain this to me ps if this basically a trick question as in a qonvalutued way of adding apologies

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score