What are the nmap commands I would use to do these four steps below?

Step 1: First start by issuing the script command to output your terminal session to a textfile.

Step 2: Perform a network scan using Nmap on the subnet to identify all hosts on the network.

Step 3: Modify your scan syntax to include each hosts' operating system type and all services running in this subnet.

Step 4: Now modify your scan syntax to include grabbing the banner for all services running in this subnet.