Can one say:<br/><span style="color:#ff0000;">1-I saw<b> the</b> brother of his who is an engineer.</span><br/>instead of:<br/>2-I saw <b>that</b> brother of his who is an engineer.<br/><br/>Can one say:<br/><span style="color:#ff0000;">3-I saw<b> the</b> brother of John's who is an engineer.</span><br/>instead of:<br/>4-I saw <b>that</b> brother of John's who is an engineer.<br/><br/>"1" seems incorrect to me but I am not at all sure about "3".<br/><br/>Gratefully,<br/>Navi.