The note Middle C has a frequency of 262 hertz and is being played at an amplitude (volume) of 0.5. Write an equation of the sine function that represents the note G above middle C if it has a frequency that is 50% higher than that of Middle C and is being played at an amplitude that is 20% lower than middle C.

The answer I came up with is:

Middle G Amplitude = 0.4

Middle G Period = 2/393

Equation = y = 0.4sin(2/393)

Is this correct? If not, can you explain what I did incorrectly by giving me a line-by-line explanation of the steps?

Thank you!