How to connect ethereum node through proxy agent using ethers.js?

I am trying to connect an Ethereum node which is outside of my organisation. So that's why I need to use a proxy agent to connect external URLs.

I am looking for a way to configure the proxy agent while setting up the ethers.js provider.

Say my ethereum node is: https://ropsten.infura.io/v3/xxxxxx and proxy is myproxy-network.com:80.

I already did this using web3.js and HttpProvider, which works but have to move with ethers.js due to business needs. The web3.js example is shown below -

const tunnel = require('tunnel')
const Web3 = require('web3')

const options = {
    keepAlive: true,
    timeout: 20000,
    agent: {
        https: tunnel.httpsOverHttp({
            proxy: {
                host: 'myproxy-network.com',
                port: 80
            }
        })
    }
}
const web3 = new Web3(new Web3.providers.HttpProvider('https://ropsten.infura.io/v3/xxxxxx', options))

Need help to do something similar with ethers.js.