Question

refer to the attachment given above ​

Answer 1

refer to the attachment given by me

Answer 2

Given

the body is in simple harmonic motion

So

a = -bx

x = -a/b

x/a = 1/b

Now we know that

time period = 2πf

time period = 2π sqrt (displacement /acceleration)

time period = 2π sqrt (1/b)