Zabbix monitoring database error

I am facing problem while installing zabbix server it's saying can't connect to database can you please help me out

i am separating my zabbix-application-server, zabbix-Database and zabbix web interface or atleast i am trying i cannot find /dev/sda5 in all three of my servers can u please help me
i am using ubuntu 22.04 LTS for all three servers. for the database i am using mysql and for the frontend (web interface) apache