Mass spring system

Suppose you have a mass spring system with mass 0.1kg and a spring with a spring constant 10 N/m^2. The spring is displaced by .08m from equilibrium. What is the largest possible value of the speed for the mass in the system? Assume the oscillations are simple harmonic in nature. 

Answer in m/s

For the above oscillator, what is the period?

answer is seconds

Calculate the maximum acceleration of the above oscillator. 

Answer in m/s^2