Answer:
A concave lens is exactly the opposite with the outer surfaces curving inward, so it makes parallel light rays curve outward or diverge. That's why concave lenses are sometimes called diverging lenses.
Considering the fluid as ideal, the pressure will spread throughout its volume. Thus,

If you notice any mistake in my english, please let me know, because my english level is still low.
Answer:
I think the last one which one lens is polarized horizontally, and one is polarized vertically