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thanks!! i feel better about this now :)

i just remembered how i managed to do q13 (b) in yesterday's mx1 exam and now that i think about it it's quite stupid lol so i blanked out on part (i) but since both part (i) and (ii) are "show that questions" i worked out part (ii) and then i went back to part (i) and wrote "from part (ii)"...