SimpleCall.sol

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.13;

contract SimpleCall {

    function main(address t) external payable {
        assembly {
            // your code here
            // call "t.foo()"
            // hint: "foo()" has function selector 0xc2985578
       }
    }
}