Damped Oscillation with a Driving Force (Help)

1. The problem statement, all variables and given/known data
A sinusoidally varying driving force is applied to a damped harmonic oscillator of force constant k and mass m. If the damping constant has a value b_1, the amplitude is A_1 when the driving angular frequency equals sqrt (k/m).

In terms of A_1, what is the amplitude for the same driving frequency and the same driving force amplitude F_{max}, if the damping constant is 3b?

In terms of A_1, what is the amplitude for the same driving frequency and the same driving force amplitude F_{max}, if the damping constant is (1/2)b?

2. Relevant equations
A= (Fmax/(sqrt(k-mw^2)^2+(b^2w^2))

w= omega


3. The attempt at a solution
I try to put in the the b values but it is saying it is incorrect.

1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution

 

I got the answers they are

(1/3) A_1

and

2A_1