What is the mass m of the string?

Suppose on a string of length L=87cm, tension T= 115N, and mass m the fundamental (1st Harmonic) has a frequency of f1=500.0 Hz. a)what is the wavelength of the fundamental? b) what is the speed of propagation of the wave in the string? c) what is the mass m of the string? d) in order to tune the string to a new fundamental frequency of 505Hz how much does the tension need to change? will it increase or decrease?