构建VI，每秒显示一个0到1之间的随机数。同时，计算并显示产生的最后四个随机数的平均值。只有产生4个数以后才显示平均值，否则显示0。每次随机数大于0.5时，使用Beep.vi产生蜂鸣声。-Building VI, second between 0 and 1 shows a random number. At the same time, calculate and display the random number generated by the average of the last four. Only the number of generated only after 4 shows, on average, or display 0. Each random number is greater than 0.5, use Beep.vi generate a beep.