Question: R1: configure passive interfaces on all routers & auto-cost reference bandwidth for >>Configure OSPF on to allow for Internet pings from PC0 and PC1.(test by
R1: configure passive interfaces on all routers & auto-cost reference bandwidth for >>Configure OSPF on to allow for Internet pings from PC0 and PC1.(test by pinging 5.5.5.5 from PC0 and PC1) 
Dont solve for me just tell me which interfaces are going to be passive in R1,2,3
R1 is the first router on the left
Fa0/0 1841 ISP Gig0/1 Se0/0/0 Se0/0/0 Se0/0/1 SeO/0/1 1941 Gig0/0 1941 Gig0/0 1941 Gig0/0 Fa0/1 Fa0/1 Fa0/1 2450 2 S1 Fa0/20 Fa0/11 Fal Fall 2960-24 S2 Fa0/2 2950-24 S3 Fa0/2 Fal Fal PC-PT PCO PC-PT PC1 PC-PT PC2 PC-PT PC3
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