suppose $X\_1,X\_2,\ldots,X\_n$ is a random sample of distribution with positive values where $E(X)=\text{Var}(X)=1$. We show order statistics of this random sample with $Y\_1,Y\_2,\ldots,Y\_n$. How can show 

1. $E\left(\displaystyle\sum\_{i=1}^n \frac{Y\_i}{X\_i}\right)\geq n$
2. $E\left(\displaystyle\sum\_{i=1}^n Y\_iX\_i\right)\leq n+n^2$