7.
如图,设点\(P\)在曲线\(y\)\(=\)\(x\)\({\,\!}^{2}\)上,从原点向\(A\)\((2,4)\)移动,记直线\(OP\)与曲线\(y\)\(=\)\(x\)\({\,\!}^{2}\)所围成图形的面积为\(S\)\({\,\!}_{1}\),直线\(OP\)、直线\(x\)\(=2\)与曲线\(y\)\(=\)\(x\)\({\,\!}^{2}\)所围成图形的面积为\(S\)\({\,\!}_{2}\).
\((1)\)当\(S\)\({\,\!}_{1}=\)\(S\)\({\,\!}_{2}\)时,求点\(P\)的坐标;
\((2)\)当\(S\)\({\,\!}_{1}+\)\(S\)\({\,\!}_{2}\)取最小值时,求点\(P\)的坐标及此最小值.