How to do leverage browser caching for specific plugins

in google page speed insights, I get the following message:

>>>>>>>>>Leverage browser caching for the following cacheable resources:
https://www.recipesaresimple.com/wp-content/plugins/backtotop/img/3.png (expiration not specified)
https://www.recipesaresimple.com/wp-content/plugins/font/font_files/angelinawebfont.woff (expiration not specified)
https://www.recipesaresimple.com/wp-content/plugins/jetpack/modules/minileven/theme/pub/minileven/inc/fonts/genericons-regular-webfont.woff (expiration not specified)
https://www.recipesaresimple.com/wp-content/plugins/wp-postratings/images/stars/rating_over.gif (expiration not specified)
https://www.recipesaresimple.com/wp-content/uploads/2013/05/header-bg.jpg (expiration not specified)<<<<<<<<<<<<

In my htaccess file i have the following code for caching:

## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive onExpiresByType text/css "access plus 14 days"
ExpiresByType text/xml "access plus 0 seconds"
ExpiresByType text/javascript "access plus 14 days"
ExpiresByType application/x-javascript "access plus 14 days"
ExpiresByType image/ico "access plus 14 days"
ExpiresByType image/jpg "access plus 14 days"
ExpiresByType image/jpeg "access plus 14 days"
ExpiresByType image/gif "access plus 14 days"
ExpiresByType image/png "access plus 14 days"
ExpiresByType image/svg+xml "access plus 1 month"
ExpiresByType text/html "access plus 14 days"
ExpiresByType video/ogg "access plus 1 month"
ExpiresByType audio/ogg "access plus 1 month"
ExpiresByType video/mp4  "access plus 1 month"
ExpiresByType video/webm "access plus 1 month"
ExpiresByType application/x-font-woff  "access plus 1 month"
ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
ExpiresByType application/xml  "access plus 0 seconds"
ExpiresByType application/json "access plus 0 seconds"
ExpiresByType application/rss+xml   "access plus 1 hour"
ExpiresByType application/atom+xml  "access plus 1 hour"
</IfModule>
## EXPIRES CACHING ##

how can i add the plugins specified in the page speed insight message to my htaccess file ?