How to make a stub router a transit router

In an EIGRP network you have been asked to make R8 a stub router (it will not receive QUERIES and it will not advertise other networks), If you do that R10 will not know how to reach other routes cause depends on R8. Your job is to configure R8 as a stub router but at the same time as a transit router for  R10. They also asked you that R8 advertises its connected routes

This is the configuration to make R8 a stub router and at the same time to advertise connected routers

router eigrp 100
 eigrp stub connected


A route by default to R8 would resolve the problem about R10 isolation. but how to spread a default route just for R10 ?.  doing a summary address by interface

conf term
interface g1.108
ip summary-address eigrp 100 0.0.0.0 0.0.0.0


Now R10 is using R8 as a default route. The problem now is R8 have a default route pointing to null with 5 as administrative distance, This is a default in EIGRP when we do a summary.

show ip route
D*    0.0.0.0/0 is a summary, 00:00:07, Null0

This default route will be replaced if we add a static default route (pointing to R5), cause static routes have 1 as administrative distance which is a better route

conf term
ip route 0.0.0.0 0.0.0.0 155.1.58.5

There we go, the only thing we have left is to tell R8 to advertise summary routes too,

router eigrp 100
 eigrp stub connected summary

Now R8 is a stub router and at the same time is a transit router only for R10