"mean" just means arithmetic average...
(22+11+10+14+10)/5=13.4
"median" is the center term (if there is one) or the average of the two center terms in an ordered sequence...so our elements ordered are:
10,10,22,14,22 Since there is a single middle term 22, 22 is the median.
"mode" just refers to the element that occurs most in the set...10 appears twice so 10 is the mode.