If $$a_1, a_2, a_3, a_4,$$ and $$a_5$$, are the decreasing order of the elements in the set $$\left\{\frac{4}{5}, \frac{2}{3}, \frac{7}{8}, \frac{3}{4}, \frac{5}{6}\right\}$$, then the correct matching of the values in List-I to those given in List-II is:

List-I	List-II
(a) $$a_1 - a_4$$	(i) 1
(b) $$2a_2 - a_5$$	(ii) $$\frac{1}{3}$$
(c) $$5a_3 - 4a_1$$	(iii) $$\frac{1}{8}$$
	(iv) $$\frac{1}{2}$$