Did the Eighth Circuit improperly deny Petitioner's Sixth Amendment right to effective assistance of counsel by failing to remand to the district court for an evidentiary hearing?

Did the district court violate its duty under the Sixth Amendment to personally inform the defendant of the range of available sentencing penalties according to 18 U.S.C. § 3553?

Did defense counsel fail to provide professional assistance regarding Petitioner's substantial sentence exposure prior to a plea, violating Petitioner's Sixth Amendment right to effective counsel under 60 Rules of Criminal Procedure 11(b)?

Did the district court err in denying Petitioner's motion for a new trial based on a misunderstanding of the law in relation to the facts and circumstances of the offense and drug quantity involved?

Whether the Eighth Circuit decision improperly denied petitioner's claim of violation by failing to remand to give him the opportunity to plead anew?