设$F_1,F_2$分别为椭圆$\frac{x^2}{3}+y^2=1$的焦点，点$A,B$在椭圆上，若$\stackrel{\rightharpoonup }{F_{1}A}=5\stackrel{\rightharpoonup }{F_{2}B}$；则点$A$的坐标是．