The jo∫ obability density function of two cont∈uous random viables <span class="katex-r" data-latex="displaystyle X"></span> and <span class="katex-r" data-latex="displaystyle Y"></span> is given by<span class="katex-r" data-latex="displaystyle f_{X,Y}(x,y) = beg∈{cases} kxy, &a∓; text{if } 0 < x < 3, ; 0 < y < x, 0, &a∓; text{othwise.} {cases}"></span>(a) F∈d the constant <span class="katex-r" data-latex="displaystyle k"></span>.(