Does a criminal defendant have a right under the Sixth Amendment to reassert his right to counsel at a critical stage (a change of plea hearing) after he had previously waived his right to counsel per Faretta?

QUESTION(S) PRESENTED : 1. Does a criminal defendant have a right under the Sixth Amendment to reassert his right to counsel at a critical . stage (a change of plea hearing) after he had previously waived his right to counsel per Faretta? . 2. Was Petitioner's Sixth Amendment right to effective assistance of appellate counsel violated when appellate counsel failed to argue that: Petitioner's Sixth Amendment right to counsel . was denied at a critical stage? 3. Was Petitioner's Sixth Amendment right to effective assistance "ef counsel violated when sentencing counsel failed to object : : to not only his criminal history, but also his criminal : history category? 4. Was Petitioner's Sixth Amendment right to effective assistance of appellate counsel violated when appellate counsel. failed . to argue that his criminal history and criminal history points were miscalculated at sentencing? , .