Currently struggling with a lecture problem, any help would be greatly appreciated, thank you so much!

It is estimated that 40% of emails are spam emails. Some software has been applied to filter these spam emails before they reach your inbox. A certain brand of software claims that it can detect 97.5% of spam emails, and the probability for a false positive (a non-spam email detected as spam) is 7.5%. If an email is detected as spam, then what is the probability that it is in fact a non-spam email