Five questions facing David Fizdale hinge on young Knicks

One of David Fizdale's biggest tasks will be to build an early rapport with Frank Ntilikina (left) and Kristaps Porzingis (right).The Knicks believe they’ve found their guy in David Fizdale, who was officially announced as head coach to ringing endorsements Monday. Here are five questions the former Grizzlies coach must address as he takes over a long-reeling franchise:

1. What did he learn from his feud with Marc Gasol in Memphis?

Fizdale has yet to express regret over the tiff that led to his axing in November, but friends say it was “a valuable lesson.’’ He overplayed his hand, but after having a magnificent rapport with LeBron James, Dwyane Wade and Chris Bosh in Miami, it’s…