please help with these old physics questions

Question

The wave number and the angular frequency are 6.2rad/m and 12 rad/s. what could be the equations of the wave?

8sin(6.2x-12t)

8sin(12x-6.2t)

12sin(6.2x-8t)

all of the above

I picked the last option but got it wrong

Find the displacement of the wave y= 12sin(6.28x-3.14t) when x=2m and t=4s

0m

6m

12m

3m

I got the last option but got it wrong

Answer 1

The standard is Y = Sin (wt-kX)

w= 12 and k= 6.2

So option 1 is correct