Write the equation of a sine function that has the following characteristics.

Amplitude: 4, Period: $7\pi $ Phase shift: $-\frac{1}{3}$

Type the appropriate values to complete the sine function.

$y=4\mathrm{sin}(?x+?)$

(Use integers or fractions for any numbers in the expression. Simplify your answers.)

Amplitude: 4, Period: $7\pi $ Phase shift: $-\frac{1}{3}$

Type the appropriate values to complete the sine function.

$y=4\mathrm{sin}(?x+?)$

(Use integers or fractions for any numbers in the expression. Simplify your answers.)