How to implement Uniswap V3 Swap & Add Liquidity in Solidity?

Smart Contracts
1

I want to use these two functions in the new UniSwap V3, anyone can explain how I archive these functions functionality in UniSwap V3?

// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
    tokenAmount,
    0, // accept any amount of ETH
    path,
    address(this),
    block.timestamp
);

// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
    address(this),
    tokenAmount,
    0, // slippage is unavoidable
    0, // slippage is unavoidable
    owner(),
    block.timestamp
);