DelegateCall.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

contract B {
    uint public num;
    address public sender;
    uint public amount;
    address public sender2;
    string public name;

    function setFirstAndLast(uint _num, string memory _name) external {
        num = _num;
        name = _name;
    }

    function setOtherThree(uint _amount) external {
        sender = msg.sender;
        amount = _amount;
        sender2 = msg.sender;
    }
}

contract A {
    uint public num;
    address public sender;
    uint public amount;
    address public sender2;
    string public name;

    function setFirstAndLast(address _contract, uint _num, string memory _name) external  {
        (bool success, bytes memory data) = _contract.delegatecall(abi.encodeWithSignature("setFirstAndLast(uint256,string)", _num, _name));
        require(success, "delegatecall failed");
    }

    function setOtherThree(address _contract, uint _amount) external {
        (bool success, bytes memory data) = _contract.delegatecall(abi.encodeWithSignature("setOtherThree(uint256)", _amount));
        require(success, "delegatecall failed");
    }
}