unreachable host destination

[20746052323138]

Hey guys, i really need your help.

So i have this homework and a don't know what to do anymore. I am a CCNA 2 student so i am a begginer 

I need to configure
R1 with next hop route
R2 with exit interface
R3 with default default static route with next hop route

I can do ping with the host profesor to Administrador, but not with Alumno 1 and Alumno 2 and vice versa
and i can't do ping from Alumno 1 and Alumno 2 to Profesor, but it works with Admnistrador

I leave here my homework only configured in ipv4 I also have to configure in ipv6

[Georg Pauwen]

Hello,

post the zipped Packet Tracer project (.pkt) file...

[20746052323138]

Hi, thanks for answering
I already post it, check it out 
It is set to ipv4 only, I also have to set it to ipv6 but due to the problem I couldn't continue it. 

[Georg Pauwen]

Hello,

I have added static default routes for both IPv4 and IPv6 on R2 and R3, and more specific static routes for IPv4 and IPv6 on R1.

Attached the revised file. You need Packet Tracer version 8 to open the file.

[20746052323138]

You saved my day, i'm so grateful. 

Thank you so much.