The length, Xcm of eels in a river may be assumed to be normally distributed with mean |\"4.8cm and standard deviation 0.80m. An angler catches an ell from the river. Determine the probability that the eel is: (i) Exactly 6cm ( 1) (ii) Less than 6 cm (2) (iii) More than 6cm (2) (iv) Within 5% of the mean length