please read this i need help please help?

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So my friend said to me he is participating in a essay competition world wide (he told me this on fb we aren't neighbours) he asked me: "can you do me a favor?" i said: "I'll see if i could" he replied: "I've written the essay on the register but my keyboard ain't working i am using screen keyboard and that i cant write essay on ms word if u could do it for me" i had to to agree we are best Friends now first of all he sent me messed pics then his writing you know rough work and i don't wanna do it now i dont know why i agreed what to do?