What is the test for accepting a criminal defendant's admission of a prior conviction?

"[B]efore accepting a criminal defendant's admission of a prior conviction, the trial court must advise the defendant and obtain waivers of (1) the right to a trial to determine the fact of the prior conviction, (2) the right to remain silent, and (3) the right to confront adverse witnesses. [Citation.] Proper advisement and waivers of these rights in the record establish a defendant's voluntary and intelligent admission of the prior conviction. [Citations.]" (People v. Mosby (2004) 33 Cal.4th 353, 356 (Mosby).) Where, as here, the transcript reveals that the trial court did not advise the defendant of each of these rights or obtain the defendant's personal waiver of them, "the reviewing court must examine the record of 'the entire proceeding' to assess whether the defendant's admission of the prior conviction was intelligent and voluntary in light of the totality of circumstances." (Id. at p. 361.)