How to set default value for radio button in react?

I have a input form I get the props and I'm mapping them for input components but for radio buttons I'm not able to set default value upon loading. Any solutions?

updateForm.jsx Now how do I select the default radio button based on employee role admin or representative?

updateForm.jsx

const updateForm = props => {
const { sortedEmployees } = props.location.state;

 const [updateFormData, handleUpdateForm] = useState({
    emp_name: sortedEmployees.emp_name,
    emp_phone: sortedEmployees.emp_phone,
    emp_role: sortedEmployees.emp_role
  });
  const { emp_name, emp_phone, emp_role } = updateFormData;

  const handleEmployeeForm = e => {
    handleUpdateForm({ ...updateFormData, [e.target.name]: e.target.value });
  };

     <form className="w-full" onSubmit={e => handleUpdateEmployee(e)}>
        <label className="label ml-2" htmlFor="Name">
          Name
        </label>
        <input
          className="input ml-2 mb-2"
          type="text"
          name="emp_name"
          value={emp_name}
          id="Name"
          required
          placeholder="Name"
          onChange={e => handleEmployeeForm(e)}
        />
        <label className="label ml-2" htmlFor="Phone">
          Phone Number
        </label>
        <input
          className="input ml-2 mb-2"
          type="text"
          pattern="[0-9]*"
          name="emp_phone"
          value={emp_phone}
          id="Phone"
          required
          placeholder="Phone number"
          onChange={e => handleEmployeeForm(e)}
        />
        <span className="ml-2 mr-4 font-semibold">Role</span>
        <label htmlFor="admin">Admin</label>
        <input
          className="ml-2 mr-2"
          type="radio"
          name="emp_role"
          value="admin"
          id="admin"
          onChange={e => handleEmployeeForm(e)}
        />
        <label htmlFor="representative">Representative</label>
        <input
          className="ml-2 mr-2"
          type="radio"
          name="emp_role"
          value="representative"
          id="representative"
          onChange={e => handleEmployeeForm(e)}
        />
        <button type="submit" value="submit" className="button is-primary ml-2">
          Update
        </button>
      </form>
}