How to interact and execute functions on a smart contract in the rinkeby Ethereum network

Alternative 1: Using metamask and MyEtherWallet

1. Download the metamask chrome extension in this link https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn
2. Configure your metamask vault and configure your password

3. Get Ether to one of your addresses in metamask with the rinkeby faucet

4. Go to MyEtherWallet to interact with your contract https://www.myetherwallet.com/#contracts

5. Copy the address of the contract that you deployed to rinkeby and the abi of your contract

6. Select the function that you want to execute

7. Sync with metamask

8. Execute the function