suppose X1,X2, is sequence of independent random variables of U(0,1) if N=min{n>0:X_(n:n)−X_(1:n)>α,0<α<1} that X_(1:n) is smallest order statistic and X_(n:n) is largest order statistic. how can show P(N>n)=P(X_(n:n)−X_(1:n)<α)