Which are correct:<br/><br/><span style="color:#0000ff;">1-We are told the plan is possible, which we don't know for sure.</span><br/><span style="color:#0000ff;">2-We are told the plan is possible, which we don't know.</span><br/><br/><span style="color:#0000ff;">3-We are told the plan is possible, which we don't know if it is..</span><br/><br/>Gratefully,<br/>Navi.