Solving the Violin String Problem: Frequency, Wave, and Tension

[NvZnPhysics]

Homework Statement

Mass of violin string = 35g
Length of string = 60cm
Frequency = 196Hz

What is the frequency change to if the string is fingered at 15cm from the top end?
How fast does the wave propagate down the string?
What is the tension in the string?

Homework Equations

v = Squareroot of (Tension Force / (m/L))
vT = wavelength

The Attempt at a Solution

No idea how to approach this problem.. Not enough given information to plug and chug into those equations.

 

[darkys]

I think the frequency change would be higher? But I'm not sure how to figure out the tension, velocity, or wavelength.