in the given network topology i am not able to have end devices connectivity i mean pcs

here are the rules for router configuration

HQ and Branch router will be configured by RIPv2 and HQ router will route have a default route to ISP router like " ip 0.0.0.0 0.0.0.0 serial0/1"

and that default route will shared in RIP updates with Branch like "HQ(config-router)#default-information originate".

and the ISP router will have static routes to Branch And HQ Lan networks to send trafic back

Now the queston is i have acheived all the cofiguration between routers as i showed below, but can not ping to end devices, can anyone tell me what could be the problem.

Branchtshow ip route Codes C connected, S- static, I- IGRP, R - RIP, M-mobile, BBGP DEIGRP, EXEIGRP external, 0 - OSPF, IA - OSPF inter area N1 - OSPE NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 -OSPF external type 2, EEGP iIS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area candidate default, U - per-user static route, o-ODR Pperiodic downloaded static route Gateway of last resort is 172.16.10.5 to network 0.0.0.0 10.0.0.0/23 is subnetted, 1 subnets 10.10.2.0 is directly connected, FastEtherneto o 172.16.0.0/30 is subnetted, 2 subnets 172.16.10.0 [120/11 via 172.16.10.5, 00:00:15, Serial0/O 172.16.10.4 is directly connected, Serialo/0 192.168.1.0/25 is subnetted, 1 subnets 192.168.1.128 is directly connected, Serial0/0 R* 0.0.0.0/0 [120/11 via 172.16.10.5, 00:00:15, Serial0/0 Branch#