(c) To divide 9 members into a group of 5 and a group of 4, we choose 5 members out of 9. This can be calculated using combinations:

\(\binom{9}{5} = 126\)

(d) To find the probability that Raman and Sanjay are in the same group, consider two cases:

1. Both are in the group of 5. Choose 3 more members from the remaining 7:

\(\binom{7}{3} = 35\)

2. Both are in the group of 4. Choose 2 more members from the remaining 7:

\(\binom{7}{2} = 21\)

Total ways for both to be in the same group:

\(35 + 21 = 56\)

Probability that Raman and Sanjay are in the same group:

\(\frac{56}{126} = \frac{4}{9} \approx 0.444\)