Ip Subnetting

Hi Friends,

I am so Curious to do CCNA … so i joined Netowrking Class….Today they teach us Ip subnetting….but i m so lazy guy 😆 …so i reach late in class 😆 …..i missed some point in subnetting..

i want to know how to find out Subnetting adress , No. of subnet , no . of host / subnet, broadcast adress and network address….

Please consider me as a amateur in networking field and please show to step by step method to find out all this

ip address – 172.168. 4. 0

netmask address – 255.255.243.0