TASK DEFINITION: This task is about translating a given Spanish language sentence to English.
PROBLEM: Y le pregunt? de d?nde?

SOLUTION: And ask him where?

PROBLEM: Y no tenemos que ir solo hacia aquellas partes del cerebro.

SOLUTION: And we don't have to go only [into] these parts of the brain.

PROBLEM: Basicamente, lo que significa que tiene que cruzar asi cuando el marginal costo curva es.

SOLUTION:
Which basically means that it has to cross like this whenever the marginal cost curve is.