Find the following sums for this small sample of data. 

 $\displaystyle {X}_{{1}}={6}$  

 $\displaystyle {X}_{{2}}={9}$ 

 $\displaystyle {X}_{{3}}={4}$ 

 $\displaystyle {X}_{{4}}={1}$ 

 $\displaystyle {X}_{{5}}={5}$ 

 
Find $\displaystyle {\sum_{{{i}={1}}}^{{5}}}{X}_{{i}}=$

Find $\displaystyle {\sum_{{{i}={1}}}^{{5}}}{{X}_{{i}}^{{2}}}=$

Find $\displaystyle {\sum_{{{i}={1}}}^{{5}}}{\left({X}_{{i}}-{5}\right)}^{{2}}=$