(i) List all possible outcomes of drawing three balls: 123, 124, 125, 134, 135, 145, 234, 235, 245, 345. There are 10 possible outcomes.

To find the probability that the sum is odd, count the outcomes where the sum is odd: 124, 134, 145, 234. There are 4 such outcomes.

The probability is given by \(\frac{4}{10} = 0.4\).

(ii) To find the probability that the largest number \(L\) is 4, consider the outcomes where 4 is the largest: 134, 145, 234, 245. There are 3 such outcomes.

The probability is given by \(\frac{3}{10} = 0.3\).