Hi Darshan
Yes, question subject matter is still relevant ... although you wouldn't be expected to draw graphs in the current 'online in Word' exam.
Re the profit profile, it's a bit like one of those 'position diagrams' that come up for call / put options or combinations of these.
The question mentions that SLAS pays a premium for the swap, hence why the payoff is a flat negative line (= size of the premium) if the mortality improvement (= reduction in mortality rate) < 10%.
Then, if the mortality improvement is greater than 10%, we start seeing the profit profile lift, as a positive payout is made on the swap at maturity.
Finally, the profit profile flat lines for mortality improvements > 20%, this limit being mentioned in the question.
Let me know if I've mis-interpreted the question.