Formatting title Page

Is this how you want it?

I have increased vspace in the Portada.tex to shift the names down

For the centering there was a n empty line after the title Academic Task 2 I have deleted that so the horizontal line underneath the heading gets shifted upward

begin{minipage}{.5textwidth}
begin{flushright}
vspace{8cm}%opcional<---------------------increase to create more vertical space 
begin{tabular}{l}