6 3 25.) If [ f(x) dx = and [ f(u) du =15, f (x) is an even function (symmetric to the y-axis), find the following: 0 a. If ( x) dx b. [f (x) dx c. [ - f ( x ) dox d. [3f (x) dx e. jf ( 3 x ) dx -2 -2 0 -2 26.) If [ f ( x) dx = 11 and [ f(u) du =15, f(x) is an odd function (symmetric to the origin), find the following: 0 3 0 a. [ f ( x ) dor b. [f ( x ) dx c. [-f(x) dx d . [3f ( x ) doc e. [f ( 3 x ) doc -2 -2 -2