What is the test for "plain error" in a motion where a defendant fails to raise any Rule 11 objections?

Where, as here, the defendant fails to raise any Rule 11 objections in the district court below, we review for plain error. See Balde, 943 F.3d at 95. To demonstrate plain error, a defendant "must show (1) error that (2) is clear or obvious under current law; (3) affects his substantial rights, which generally means affects the outcome of the district court proceedings; and (4) seriously affects the fairness, integrity, or public reputation of judicial proceedings." United States v. Le, 902 F.3d 104, 109 (2d Cir. 2018). Regarding the third prong, "[w]ithin the context of plea proceedings, a defendant must establish that the violation affected substantial rights and that there is a reasonable

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