Please show me the work for how to convert the below series into summation notation.

6 Summation Notation and Rules EXERCISE 1.1 Given x1 = 22, X2 = 14, Xq = 15, x4 = 26, X; = 18, y1 = 9, yz = 15, y; = 21, y4 = 20, ya = 10 Evaluate the following: 5 5 Ex; 3. 2 ( x, + y) 1=1 1=3 19 5 5 5 2. 2 (X, - yi) 4. E( x, + 1) i=1 1=3 0