3. Evaluate the line integTals I 3- = f (a: + 23;) dac + $2 dy, j = 1, 2, where Cl is the line 03' segment from (0,0) to (4,0), and 02 consists of line segments from (0,0) to (2,1) and from (2,1) to (4,0). Is II equal to 12