题目如下：

From Excel, previously, each of you generated 10 values from F(X)=1-(1-x)^3, X>0. These represent samples each of size n=10. The sample means in each case are?
1. The average of the sample means is?
2. The variance of the sample means is?
3. The distribution of the sample means looks like?

请教各位，应该怎么解答？