Subnetting between routers and multiple VLANs

micano

I have a subnetting problem.
There is routerA connected to another routerB.
RouterB then connects to SwitchA.
SwitchA has 4 VLANs attached to it.
VLAN 10 needs 1500 hosts
VLAN 20 needs 500 hosts
VLAN 30 needs 60 hosts
VLAN 40 needs 30 hosts

The starting network is 10.0.0.0/8
What would the serial interface address, subnet address, and subnet mask be?

dontstop

VLAN 10 needs 1500 hosts - 10.0.0.0/21 (10.0.0.1 - 10.0.7.254) [2046 Hosts]
VLAN 20 needs 500 hosts - 10.0.8.0/23 (10.0.8.1 - 10.0.9.254) [510 Hosts]
VLAN 30 needs 60 hosts - 10.0.10.0/26 (10.0.10.1 - 10.0.10.62) [62 hosts]
VLAN 40 needs 30 hosts - 10.0.10.64/27 (10.0.10.65 - 10.0.10.94) [30 hosts]
Point to point Serial Link - 10.0.10.96/30 (10.0.10.97 - 10.0.10.98 ) [2 hosts]