So I know some of them but not all them sorry
5. If m<5=70 then m<6= <em><u>20</u></em>
<em>Why? </em> Because there is a 90 degree angle there and if m<5 is 70 all you have to do to get m<6 is subtract 70 from 90 and you get 20 degrees
6. If m<5=70 then m<1= <em><u>90 </u></em> and m<4=<em><u>90 </u></em>
<em>Why? </em>Because you can see based on the drawing that they form right angles
4a. FGK is right angles
4b. The measure of FGK is 90 in total
<em>Why? </em> It has the right angle
Hope this helps:) this was all I could remember