mathematical notation question

Question

Write the following is mathematical notation (Hint: ∀ ∃ )
a) All students attend classes
b) Some people are criminal

Answer 1

∃x:P(x) reads 'there exists an x for which P(x) is true'.

∀x:P(x) will be true if for all values of x P(x) is true.

-Wikipedia

 

a) ∀students,students attend classes

b) ∃people:people are criminal

 

This would be my guess.