What is the burden of ineffective assistance on appeal?

" 'To establish ineffective assistance of counsel, a defendant must show that (1) counsel's representation fell below an objective standard of reasonableness under prevailing professional norms, and (2) counsel's deficient performance was prejudicial, i.e., there is a reasonable probability that, but for counsel's failings, the result would have been more favorable to the defendant.' [Citation.]" (People v. Johnson (2015) 60 Cal.4th 966, 979-980.) On appeal, we " 'defer to counsel's reasonable tactical decisions in examining a claim of ineffective assistance of counsel [citation], and there is a "strong presumption that counsel's conduct falls within the wide range of reasonable professional assistance." [Citation.] [The d]efendant's burden is difficult to carry on direct appeal, as [the courts] have observed: " 'Reviewing courts will reverse convictions [on direct appeal] on the ground of inadequate counsel only if the record on appeal affirmatively discloses that counsel had no rational tactical purpose for [his or her] act or omission.' " [Citation.]' [Citation.] If the record on appeal ' " 'sheds no light on why counsel acted or failed to act in the manner challenged[,] . . . unless counsel was asked for an explanation and failed to provide one, or unless there simply could be no satisfactory explanation,' the claim on appeal must be rejected," ' and the 'claim of ineffective assistance

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