Given IP  198 . 113 . 216 . 97 / 28  
#1. & 2.  Find the SubNetwork 

#3.  Find the First useable IP address  198 . 113 . 216 . 97 
#4.  Find the Broadcast address  198 . 113 . 216 . 111 
#5  Find the Last useable IP address  198 . 113 . 216 . 110 
#6.  What is the Total Number of IPs per Subnet?  16 
#7.  How many useable Hosts address per subnet?  14 
#8.  What is the Next Subnet Number?  198 . 113 . 216 . 112 
#9.  What IP Class is this?  Class C 
#10.  How many possible Subnetworks with this class?  Bits this Class = 24 Bits Subnet Mask= 28 2^ 4 = 16 
#11.  What is the 4th SubNetwork Number?  198.113.216.64 