I am trying to break an arc4 encryption and I'm having a little problem. I know the plain text is "this is the secret plain text" and I know the key is:

{0x13, 0x37, (byte)0xd0, 0x0d, 0x15, 0x50, (byte)0xc0, 0x01, (byte) 0xde, (byte) 0xff, 1}

I also know the cipher text is:

;A'iW_3

How do I generate plain text using cipher text and the key?

Thanks