Given IP  54 . 69 . 171 . 193 / 15  
#1. & 2.  Find the SubNetwork 

#3.  Find the First useable IP address  54 . 68 . 0 . 1 
#4.  Find the Broadcast address  54 . 69 . 255 . 255 
#5  Find the Last useable IP address  54 . 69 . 255 . 254 
#6.  What is the Total Number of IPs per Subnet?  131072 
#7.  How many useable Hosts address per subnet?  131070 
#8.  What is the Next Subnet Number?  54 . 70 . 0 . 0 
#9.  What IP Class is this?  Class A 
#10.  How many possible Subnetworks with this class?  Bits this Class = 8 Bits Subnet Mask= 15 2^ 7 = 128 