Errors on top of Wp-Admin

Can anyone help with the following warnings please such as what i should do. The developer of the theme is not available and i cant ask him and i need to get it fixed asap please if anyone has any tips.

Thanks in advance

Ryan

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Warning: include(/home/mramt/public_html/wp-content/themes/mra/inc/site-options.php) [function.include]: failed to open stream: No such file or directory in /home/mramt/public_html/wp-content/themes/mra/inc/theme-options.php on line 452

Warning: include() [function.include]: Failed opening ‘/home/mramt/public_html/wp-content/themes/mra/inc/site-options.php’ for inclusion (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/mramt/public_html/wp-content/themes/mra/inc/theme-options.php on line 452

Warning: Cannot modify header information – headers already sent by (output started at /home/mramt/public_html/wp-content/themes/mra/inc/theme-options.php:452) in /home/mramt/public_html/wp-includes/option.php on line 563

Warning: Cannot modify header information – headers already sent by (output started at /home/mramt/public_html/wp-content/themes/mra/inc/theme-options.php:452) in /home/mramt/public_html/wp-includes/option.php on line 564