The pop fivesome’s second album takes aim at soulful R&B with some major assists. And with unerring consistency, it hits with laser precision. 7/27 radiates swagger, but there’s plenty here beyond just attitude (the Ty Dolla $ign-enriched “Work from Home”) and clear hits-in-waiting (the Missy Elliott collaboration “Not That Kinda Girl”), as vulnerable moments (“Write On Me,” “Dope,” “No Way”) showcase the group’s dynamism with just as much impact.