A.VLANs 1-5 will use fa0/10 as a backup only.
B.VLANs 6-10 will use fa0/10 as a backup only.
C.VLANs 1-5 will be blocked if fa0/10 goes down.
D.VLANs 1-10 are configured to load share between fa0/10 and fa0/12.
E.VLANs 6-10 have a port priority of 128 on fa0/10.