complete the formal geometric proof.

given: <1 and <2 are supplementary; <3 and <4 are supplementary; <2 = <3

prove: <1=<4

thank you so so much!! :D
picture is included! (sorry for the bad quality)

(need answers for reasons 4. and 7. and statements 6. and 8.)
the options for the answers are at the bottom (a. b. c. d. e.)

(40 POINTS)