Twenty Twelve Child Theme Excerpts Authors & Archives

Im doing a twenty twelve site with a child theme. Im trying to add excepts. I have them on the main blog page and search.

Im trying to figure out where – how to add them for Authors Archive and Archives.

I added in content.php
<?php if ( is_search() || is_home() ) : // Display Excerpts for Search and Homepage ?>

and functions.php

// Remove the ... from excerpt and change the text
function change_excerpt_more()
{
  function new_excerpt_more($more)
	{
	// Use .read-more to style the link
	  return '<span class="continue-reading"> <a href="' . get_permalink() . '"> Continue Reading ?</a></span>';
	}
  add_filter('excerpt_more', 'new_excerpt_more');
}
add_action('after_setup_theme', 'change_excerpt_more');

function custom_excerpt_length( $length ) {
	return 100;
}
add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );

Thanks