I need help with a network assignment on subnetting. If you don't know IT/Networking please do not respond.

I need the following after subnetting IP 99.0.0.0/8 to 2747 subnets:

1. The new subnet mask after the subnetting (10%)
2. The following for subnets #1, #920, #1762, and #2747: 

a. Subnet's network address (3%)
b. Subnet's broadcast address (3%)
c. Subnet's range of available IP addresses (4%)

For each of the above I need to show calculations on how to get to the answer (50%)