7.
已知\(P=\left\{ x\left| {{x}^{2}}-3x+2\leqslant 0 \right. \right\}\),\(S=\left\{ x\left| 1-m\leqslant x\leqslant 1+m \right. \right\}\).
\((1)\)是否存在实数\(m\),使\(x\in P\)是\(x\in S\)的充要条件?若存在,求出\(m\)的取值范围;
\((2)\)是否存在实数\(m\),使\(x\in P\)是\(x\in S\)的必要条件?若存在,求出\(m\)的取值范围.