Download and upload limit on port 2

hi i am very much new to this mikrotik 250gs switch. and planning to work with VLAN and Bandwidth up and down limits
connections
port 1 > connects to router
port 2 > connects to access points
port 3 > connects to VOIP
port 4 > connects to back office PC

plan is

  1. Separate VLAN for each port
  2. Port 2 cant talk to port 3 and port 4
  3. Port 3 need bandwidth limit down 6mbps up 2mbps for better VOIP
    all shares inter through port 1
    Please help with this scenario