Standing waves are produced by the superposition of the wave

$y=3sin(wt-6x)$

with its reflection. Where $(x,y$ in $cm,t$ in seconds$).$

the amplitude of the resultant wave and the internodal distance $($in cm respectively$)$ are:

Select one:

a$.3,6.$

b$.6,\frac{}{6}.$

c$.6,3.$

d$.6.\frac{}{3}$