If $A=\sin^{2}x+\cos^{4}x$, then for all real $x$ (1) $\frac{13}{16}\leq\mathrm{A}\leq 1$ (2) $1\leq A\leq 2$ (3) $\frac{3}{4}\leq\mathrm{A}\leq\frac{13}{16}$ (4) $\frac{3}{4}\leq\mathrm{A}\leq 1$
If $A=\sin^{2}x+\cos^{4}x$, then for all real $x$\\
(1) $\frac{13}{16}\leq\mathrm{A}\leq 1$\\
(2) $1\leq A\leq 2$\\
(3) $\frac{3}{4}\leq\mathrm{A}\leq\frac{13}{16}$\\
(4) $\frac{3}{4}\leq\mathrm{A}\leq 1$