Consider a joint probability density function of two random variables X and Y…

Consider a joint probability density function of two random variables X and Y

$f_{X,Y}(x, y) = \begin{cases} \frac{xy}{2}, & \text{if } 0 < x < 2 \text{ and } 0 < y < x \\ 0, & \text{otherwise} \end{cases}$

Then, 𝐸[𝑌|𝑋 = 1.5] is ______.