(i) The value of \(x + y + z\) is 15 . If \(a,x,y,z,b\) are in A.P. while the value of \(\frac{1}{x} + \frac{1}{y} + \frac{1}{z}\) is \(\frac{5}{3}\). If \(a,x,y,z,b\) are in H.P. then find \(a\) and \(b\).\\ (ii) If \(x,y,z\) are in H.P. then show that \(log(x + z) + log(x + z - 2y) = 2log(x - z)\).