Which expression is equivalent to (x Superscript one-fourth Baseline y Superscript 16 Baseline) Superscript one-half? x Superscript one-half Baseline y Superscript 4 x Superscript one-eighth Baseline y Superscript 8 x Superscript one-fourth Baseline y Superscript 8 x Superscript one-fourth Baseline y Superscript 4.