These are the steps:

1. Open nmap in Command Prompt.
2. Run the following syntax in the Command Prompt to perform a TCP SYN scan:

    nmap –v –sS 192.168.75.137

3. Run the following syntax in the Command Prompt to perform a TCP Connect scan:

     nmap –v –sT 192.168.75.137

4. Run the following syntax in the Command Prompt to perform a TCP NULL scan:

    nmap –v –sN 192.168.75.137