7. (5%) Let $X_1$ and $X_2$ have the joint probability density function
$f(x_1, x_2) = \frac{1}{2}, 0 < x_1 < x_2 < 2$
Let $Y = \frac{X_1}{X_2}$. Find the probability density of $Y$.
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7. (5%) Let $X_1$ and $X_2$ have the joint probability density function
$f(x_1, x_2) = \frac{1}{2}, 0 < x_1 < x_2 < 2$
Let $Y = \frac{X_1}{X_2}$. Find the probability density of $Y$.