The jo∫ obability density function of two random viables <span class="katex-r" data-latex="displaystyle X"></span> and <span class="katex-r" data-latex="displaystyle Y"></span> is<span class="katex-r" data-latex="displaystyle f_{X,Y}(x,y) = beg∈{cases} k(y-x), &a∓; text{if } 0 < x < y < 2, 0, &a∓; text{othwise.} {cases}"></span>(a) F∈d <span class="katex-r" data-latex="displaystyle k"></span>.(b) F∈d <span class="katex-r" data-latex="displaystyle P(max{X, Y} le 1)"></span>.(c) F∈d