Of those with a university degree, 70.2% earn at least $60,000 per year within 10 years of

Question:

Of those with a university degree, 70.2% earn at least $60,000 per year within 10 years of finishing school. Of those without a university degree, the corresponding percentage is 35.4%. Of the entire population, 24.6% have a university degree.
a. What percentage of the entire population earns at least $60,000 per year within 10 years of finishing school?
b. Of those who earn less than $60,000 per year within 10 years of finishing school, what percentage don't have a university degree?