Pendulum with a spring attached

[physiccool78]

Homework Statement

Mass = 0.2 kg
Length of pendulum = 0.2 m
Force constant 3 n/m

Homework Equations

T = 2pi rad(m/k)
Sum of Torque

The Attempt at a Solution

I am really confused on where to start. I know you simply cannot plug it into the first equation listed above since all the mass isn't concentrated at the tip of the spring. I tried to find the distance the spring was compressed by attempting pythag, but that didn't work since I didn't have enough information. I attached the full question.

 

[TSny]

Hopefully, you've seen the derivation for the period of a physical pendulum: http://hyperphysics.phy-astr.gsu.edu/hbase/pendp.html
Try to modify this derivation to include the effect of the spring.