Stuck on the last 3 problems please explain thank you.

Problem 15 Network Address 93.0.0.0 /19 Address class "T Default subnet mask 255.0.0.0 Custom subnet mask 255.255.224.0 Total number of subnets_2048 (2) Total number of host addresses 8192 Number of usable addresses_8190 (22) Number of bits borrowed What is the 15th "subnet range? 93.0.1.192-93.0.1:224 What is the subnet number for the 9th subnet? 43-0. What is the subnet broadcast address for the 7th subnet? What are the assignable addresses for the 12th subnet