LACP between FGT-500D (HA, Active-Passive) devices and stacked Cisco3850 switches.

Hello.

We use two FGT-500D devices in a HA mode( active-passive mode).

We have a plan to connect two new stacked Cisco Catalyst 3850 switches(L3 Core Switches) to FGT-500D devices.

We will use a stacked Cisco Catalyst 3850 switches, as a L3 core switch.

 Is it possible to connect  stacked Cisco Catalyst 3850 switches to FGT-500D devices using LACP ?

 If possible, how should we set up LACP in Cisco Catalyst 3850 switches and FGT-500D devices correctly ?

( Would you mind giving me an example LACP configuration at Cisco Catalyst 3850 and FGT-500D deves ? )

Thank you for your attention and help.