Given IP  157 . 91 . 178 . 152 / 22  
#1. & 2.  Find the SubNetwork 

#3.  Find the First useable IP address  157 . 91 . 176 . 1 
#4.  Find the Broadcast address  157 . 91 . 179 . 255 
#5  Find the Last useable IP address  157 . 91 . 179 . 254 
#6.  What is the Total Number of IPs per Subnet?  1024 
#7.  How many useable Hosts address per subnet?  1022 
#8.  What is the Next Subnet Number?  157 . 91 . 180 . 0 
#9.  What IP Class is this?  Class B 
#10.  How many possible Subnetworks with this class?  Bits this Class = 16 Bits Subnet Mask= 22 2^ 6 = 64 