Whether a state statute's definition of 'cocaine' differs from the federal definition based on the plain, unambiguous language of the statutes

QUESTIONS PRESENTED 1. Ifa state statue’s definition of “cocaine” differs from the federal definition of “cocaine” based on the plain, unambiguous language of the statutes, is the District Court’s failure to notice this difference “clear” and “obvious” for the purpose of “plain error” review? 2. Whether an individual who runs away from a police encounter can be arrested when the basis of the arrest is not established? i