This lab was configured using HPs H3C cloud lab software. I've attached the exported configuration file.

DEVICE 1 - LOCAL
bgp 65000
 peer 172.16.0.1 as-number 65999
 #
 address-family ipv4 unicast
  network 10.0.0.0 255.0.0.0
  peer 172.16.0.1 enable
  peer 172.16.0.1 route-policy RP-WAN-IN import
#
route-policy RP-WAN-IN permit node 10
 if-match ip address prefix-list PL-WAN-IN
#
route-policy RP-WAN-IN permit node 20
 if-match as-path 1
#
 ip prefix-list PL-WAN-IN index 10 permit 50.0.0.0 8
#
 ip as-path 1 permit _64555$

bgp 64555
 peer 172.16.2.2 as-number 64000
 peer 172.16.3.1 as-number 61000
 #
 address-family ipv4 unicast
  network 90.0.0.0 255.0.0.0
  network 100.0.0.0 255.0.0.0
  peer 172.16.2.2 enable
  peer 172.16.3.1 enable
#

DEVICE 5 - Internet
bgp 61000
 peer 172.16.3.2 as-number 64555
 #
 address-family ipv4 unicast
  network 80.0.0.0 255.0.0.0
  peer 172.16.3.2 enable