100 3. Provide an example of two different functions f: E E and f2: E E such that both f and 2 are not isometries but their linear combination 43f + 19f2 is an isometry. In your example explain why f and f2 are not isometries and why the linear combination is an isometry. (3pt) correct example without justification is Opts; justified that and 2 are not isometries is 2pts; justified that the combination is an isometry is 1 pts Justification: terials to any webs