如圖,已知直線y=2x與雙曲線y=
(k≠0)交第一象限于點(diǎn)A(m,4).
(1)求點(diǎn)A的坐標(biāo)和反比例函數(shù)的解析式;
(2)將點(diǎn)O繞點(diǎn)A逆時(shí)針旋轉(zhuǎn)90°至點(diǎn)B,求直線OB的函數(shù)解析式;
(3)在(2)的條件下,若點(diǎn)C是射線OB上的一個(gè)動(dòng)點(diǎn),過點(diǎn)C作y軸的平行線,交雙曲線y=
(k≠0)的圖象于點(diǎn)D,交x軸于點(diǎn)E,且S
△DCO:S
△DEO=2:3,求點(diǎn)C的坐標(biāo).