simplifying the following expressions by applying the laws of exponent/patulong pls makasagot ng tama/follow+heart+brainliest)

1. (x⁴ y²)²=
2.(x³)² (x⁴)⁵=
3.(a² b⁸)³=
(a b )
4.(5a² bc⁴)⁰=​