Trunk with FG400D with Switch Cisco 2960 and Switch HPE 5700

Hi all,

My network diagram is: Trunk FG400D with Switch 2960 and Switch HP 5700. I have 2 2960 and 2 5700, they are stackwise every kind and group port. Do you recommend me mode of group port between 2 2960 and 2 5700 to FG400?