Is defense counsel required, in order to provide effective assistance
of counsel, to give the defendant an estimate of the potential guideline
sentence he is facing in advising the defendant on whether to enter a plea
of guilty to Federal criminal charges?

Is defense counsel ineffective when counsel fails and refuses to give
a defendant any estimate of the various potential guideline sentences
depending on whether he pleads guilty or goes to trial?

Is defense counsel required to provide an estimate of potential guideline sentence when advising defendant on pleading guilty?