answer with explanation

There are two groups: Casual users and Serious users. Serious users play for an average of 140 mins per day and casual users play for an average of 40 mins per day.

Market research shows that if we set the annual fee at $ 358, instead of $400, we would increase the number of users interested in this service by 400,000 users. What would the distribution of your total user base need to be in order for this venture to still be profitable?