According to World Athletics rules, what is the minimum required weight of a men's competition javelin?

In rain-interrupted limited-overs cricket matches, the Duckworth-Lewis-Stern (DLS) method recalculates targets based primarily on which factors?

Consider the following statements regarding the rules of Field Hockey: Statement I: The term 'Back-stick' refers to a foul awarded when a player strikes the ball with the rounded back of the hockey stick. Statement II: In a professional match, hockey players are allowed to use both the flat side and the rounded side of their stick to play the ball. Which of the above statements is/are correct?