Can you please help me answer the following questions. I really need them and I will rate. 1. The position of an object

[answerhappygod]

Can you please help me answer the following questions. I really
need them and I will rate.
1. The position of an object that is oscillating on a
spring is given by the equation x = (0.232 m)
cos[(2.81 s-1)t]. If the force constant
(spring constant) is 29.8 N/m, what is the potential energy stored
in the mass-spring system when t = 1.42 s?
0.350 J
0.256 J
0.329 J
0.399 J
0.798 J
2. An object with mass 0.360-kg, attached to a spring with
spring constant k = 10.0 N/m, is moving on a
horizontal frictionless surface in simple harmonic motion of
amplitude A = 0.0820 m. What is the kinetic
energy of the object at the instant when its displacement
is x = 0.0410 m?
0.042 J
0.013 J
9.86 J
0.025 J
2.46 J