0 4: User not required 1 4: User not required 2 4: User not required 3 4: User not required 4 4: User not required 5 3: User required 6 4: User not required 7 4: User not required 8 4: User not required 9 4: User not required 10 4: User not required 11 4: User not required 14 3: User required 15 4: User not required 16 3: User required 17 4: User not required 18 3: User required 21 3: User required 22 3: User required