Two traveling sinusoidal waves are described by the wave functions y1 = (5.00 m) sin [ (4.00x

Two traveling sinusoidal waves are described by the wave functions
y1 = (5.00 m) sin [π (4.00x ─ 1 200t)]
And
y2 = (5.00 m) sin [π (4.00x ─ 1 200t ─ 0.250)]
Where x, y1, and y2 are in meters and t is in seconds
(a) What is the amplitude of the resultant wave?
(b) What is the frequency of the resultant wave?