ATTENTION IF YOU HAVE ANSWERED THIS QUESTION BEFORE WITH THE

ATTENTION: IF YOU HAVE ANSWERED THIS QUESTION BEFORE WITH THE ANSWER 4991.74 K DO NOT ANSWER IT AGAIN, THAT ANSWER IS WRONG.

Straight off from the graph,it does seem that the temp is around 5000K or to that order of magnitude.

However,from detailed calculations(using hint 2) the answer seems to be around 55K.