convinces us that the district court fully complied with the mandates of Rule 11 in accepting Mayfield’s guilty plea and ensured that Mayfield entered his plea knowingly and voluntarily and that the plea was supported by an independent factual basis. See United States v. DeFusco, 949 F.2d 114, 116, 119-20 (4th Cir.1991). Counsel also questions whether the district court erred by imposing a mandatory term of life imprisonment under § 841(b)(1)(A). Because Mayfield did not object in the district court on this ground, our review is for plain error. See United States v. Hughes, 401 F.3d 540, 547-48, 555 (4th Cir.2005) (discussing standard). We find no error in the district court’s imposition of the mandatory life sentence. See United States v. Burgess, 478 F.3d 658, 660-62 (4th Cir.2007) (<HOLDING>). In accordance with Anders, we have reviewed
holding that harp foreclosed any claim that north carolina conviction for felony pos session of cocaine did not qualify as a felony drug offense for purposes of applying the enhanced penalty under  841b holding lopez was inapplicable to the language prior conviction for a felony drug offense in 21 usc  841b1a because felony drug offense was defined in 21 usc  80244 as an offense that is punishable by imprisonment for more than one year under any law of the united states or of a state holding that a felony drug offense is an offense punishable by more than one year as defined in 21 usc  80244 2000 regardless of whether the state of conviction classified the particular offense as a misdemeanor or felony holding that defendants prior felony convictions in georgia state court for drugrelated conspiracy and simple possession qualified as predicate prior felony drug offenses for  841b1a because under the plain language of the statute  felony drug offense includes any criminal conduct relating to narcotics including simple possession which a state has proscribed as a felony holding that for purposes of applying enhanced penalty in  841b1a felony drug offense includes any crime punishable by more than one year of imprisonment regardless of whether it is classified as a felony or a misdemeanor