Given:
The mass of the object, m=4.85 kg
The position of the object is given by the equation,

The angular frequency, ω=19.2 rad/s
The frequency, f=3.03 Hz
The period, T=0.33 s
To find:
(d) Spring constants.
Step-by-step explanation:
The spring constant of a spring is related to the angular frequency of the oscillation of the spring by the equation,

Where k is the spring constant.
On substituting the known values,

Final answer:
The spring constant of the spring is 1787.9 N/m