(a) The angle between the vectors \(\bar a\) and \(\bar b\) such that
\(|\vec a| = |\vec b| = \sqrt{2}\)
\(\bar a.\bar b = 1 \)
(i)\(\frac{π}{3}\)
(ii) \(\frac{π}{3}\)
(iii) \(\frac{π}{4}\)
(iv) 0
b) Find the unit vector along \(\bar a - \bar b\) where \(\bar a\) = i + 3j – k and \(\bar b =\) 3i + 2j + k