Solve the all parts of following question given below:

Question: A guitar player tunes the fundamental frequency of a guitar string to 540 Hz.

Part A: What will be the fundamental frequency if she then increases the tension in the string by 21%?

Part B: What will it be if, instead, she decreases the length along which the string oscillates by sliding her finger from the tuning key one-third of the way down the string toward the bridge at the lower end?

Hello Experts please provide me the detailed computation for above question.