You can Download Ready made project here (RIP ROUTING):

https://raw.githubusercontent.com/AlbatrossC/sppu-codes/main/answers/cnl/4_rip_routing.pkt

JUST OPEN THIS FILE IN CISCO Packet TRACER AND FAST FORWARD THE TIME.

Manually Doing this:
1) Add devices
3 × Router-PT → name them Router0, Router1, Router2
3 × Switch-PT → Switch0, Switch1, Switch2
6 × PC-PT → PC0..PC5

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2)Connect devices (Automatic)
Click Lightning (Automatically Choose Connection) tool

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3) Configure routers via Config tab

Router0 (click Router0 → Config)
FastEthernet0/0
IP Address: 10.10.10.0
Subnet Mask: 255.255.255.0
Status: On

Serial2/0
IP Address: 40.40.40.1
Subnet Mask: 255.255.255.0
Status: On

RIP (Config → RIP)
Networks (add):
10.0.0.0
40.0.0.0

Router1 (click Router1 → Config)
FastEthernet0/0
IP Address: 20.20.20.0
Subnet Mask: 255.255.255.0
Status: On

Serial2/0
IP Address: 40.40.40.2
Subnet Mask: 255.255.255.0
Status: On

Serial3/0
IP Address: 50.50.50.1
Subnet Mask: 255.255.255.0
Status: On

RIP
Networks:
20.0.0.0
40.0.0.0
50.0.0.0


Router2 (click Router2 → Config)
FastEthernet0/0
IP Address: 30.30.30.0
Subnet Mask: 255.255.255.0
Status: On

Serial2/0
IP Address: 50.50.50.2
Subnet Mask: 255.255.255.0
Status: On

RIP
Networks:
30.0.0.0
50.0.0.0

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4) Configure PCs via Desktop → IP Configuration 

| PC  | IP Address   | Subnet Mask     | Default Gateway |
| --- | ------------ | --------------- | --------------- |
| PC0 | `10.10.10.1` | `255.255.255.0` | `10.10.10.0`    |
| PC1 | `10.10.10.2` | `255.255.255.0` | `10.10.10.0`    |
| PC2 | `20.20.20.1` | `255.255.255.0` | `20.20.20.0`    |
| PC3 | `20.20.20.2` | `255.255.255.0` | `20.20.20.0`    |
| PC4 | `30.30.30.1` | `255.255.255.0` | `30.30.30.0`    |
| PC5 | `30.30.30.2` | `255.255.255.0` | `30.30.30.0`    |


5) Test by sending messages.