No commands are necessary; the eigrp stub command enables the stub router to advertise connected and summary routes. The eigrp stub command configures a router as a stub router. When the eigrp stub command is issued without parameters, summary routes and directly connected routes are advertised by default. The following options can be issued with the eigrp stub command:
- receive-only-configures the router to receive routes but not advertise routes
- connected -configures the router to advertise directly connected networks
- redistributed -configures the router to advertise routes learned from another protocol
- static -configures the router to advertise static routes
- summary-configures the router to advertise summary routes
- leak-map map-name-configures the router to advertise specific dynamically learned prefixes

With the exception of the receive only option, all of the options can be included together in the eigrp stub command. For example, to configure a stub router to advertise connected, static, and summary routes, you should issue the eigrp stub connected static summary command.
When you issued the eigrp stub command in the scenario, you enabled Router1 to advertise connected and summary routes. Although issuing the eigrp stub connected summary command would also enable Router1 to advertise connected and summary routes, you are not required to advertise these routes.
Issuing the eigrp stub connected and eigrp stub summary commands in sequence would not enable Router1 to advertise connected and summary routes; only the last command issued defines the routes that are advertised by Router1. Thus, issuing these two commands in sequence would configure Router1 to advertise only summary routes.
Issuing the eigrp stub static connected summary command would enable Router1 to advertise connected, summary, and static routes. However, you are not required to advertise static routes, and the eigrp stub command already configures Router1 to advertise connected and summary routes.
The redistribute static command enables a router to redistribute static routes into Enhanced Interior Gateway Routing Protocol (EIGRP) but does not configure the router to advertise those static routes. Similarly, the redistribute connected command enables a router to redistribute directly connected routes into EIGRP but does not configure the router to advertise those connected routes.