Help pls ty

8) B) y- cox A) B) 4 C) D) + + + - It -37 Without graphing the function, determine its amplitude or period as requested. 9) y = 4 sin(3x) Find the amplitude. 9) - A) 4 B) C) 3 D) 10) y = sin(3x) Find the period. 10) A) 3 B) 1 C) 2nt D) 27