If the mean and the standard deviation of the data $3, 5, 7, a, b$ are 5 and 2 respectively, then $a$ and $b$ are the roots of the equation: (1) $x^2 - 10x + 18 = 0$ (2) $2x^2 - 20x + 19 = 0$ (3) $x^2 - 10x + 19 = 0$ (4) $x^2 - 20x + 18 = 0$
If the mean and the standard deviation of the data $3, 5, 7, a, b$ are 5 and 2 respectively, then $a$ and $b$ are the roots of the equation:\\
(1) $x^2 - 10x + 18 = 0$\\
(2) $2x^2 - 20x + 19 = 0$\\
(3) $x^2 - 10x + 19 = 0$\\
(4) $x^2 - 20x + 18 = 0$