Given that [math]P(X = a) = r[/math], [math]P(\max(X,Y) = a) = s[/math],and [math]P(\min(X,Y) = a) = t[/math], show that you can determine [math]u = P(Y = a)[/math] in terms of [math]r[/math], [math]s[/math], and [math]t[/math].