Who is the artist of the Ngady Mwaash Mask (search on yah oo, then click images, it should be the 4th one) and the artist of the Sowo Mask, (same thing, go to yah oo search the name then click images, and it should be the 1st one)

for the Ngady Mwaash, Id said the Kuba people, and for the Sowo Mask id say the Mende people? Idk if im right.

These very clearly say "artist unknown" so the only choice is what you have written: someone in the Kuba culture or Mende culture, yes.

ok also it asks are they realistic or stylistic, and i said stylistic for both. Am i right?

Yes, stylistic.

ok and it says choose two elements of art (form, texture, color, shape, line, and value) for each mask. For the Ngady Mwaash mask id say color and shape, and for the Sowo Mask, id choose texture and form. Am i correct

I agree, yes.

im starting to think the sowo mask is realistic.. because ive seen on some sites it says that it depicts a womans face because of the large forehead, small mouth, etc. Im confused as to whether its stylistic or realistic now :/