如图,方格纸中每个小正方形的边长都是单位\(1\),\(\triangle ABC\)在平面直角坐标系中的位置如图所示.
\((1)\)将\(\triangle ABC\)绕点\(O\)顺时针方向旋转\(90^{\circ}\)后得\(\triangle A_{1}B_{1}C_{1}\), 画出\(\triangle A_{1}B_{1}C_{1}\)并直接写出点\(C_{1}\)的坐标为 .
\((2)\)以原点\(O\)为位似中心,在第四象限画一个\(\triangle A_{2}B_{2}C_{2}\), 使它与\(\triangle ABC\)位似,并且\(\triangle A_{2}B_{2}C_{2}\)与\(\triangle ABC\)的相似比为\(2\):\(1\);
\((3)\)若\(\triangle ABC\)中有一点\(P\)坐标为\((x,y)\),请直接写出经过以上变换后\(\triangle A_{1}B_{1}C_{1、}\triangle A_{2}B_{2}C_{2}\)中点\(P\)的对应点\(P_{1}\)、\(P_{2}\)的坐标分别为:\(P_{1}(\) , \()\),\({\,\!}P_{2}(\) , \().\)