Help me please , l can't solve it ​

Which is the focus of a parabola with equation y2=4x

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.

Ineed the question and choices are in the