Hiding avatar from everywhere except the front page and it's post

Hi! I’m currently working to modify a theme and have to allow poster’s avatar only on the front page and it’s post. Basically, i have a bunch of categories and want it to only show on certain categories, or just the front page and it’s post.

I showed it using this code in my theme index file:

<?php echo get_avatar( get_the_author_email(), ’60’ ); ?>

is there a way to modify this so that it will only appear when viewing a certain category, and only on the front page and it’s own post?

I am thinking of something along the line of:

if (is_category(‘CATEGORY ID’)) {

the code can either be put in the file’s itself or the function if possible. I don’t have any experiences with php, so i am not able to do this. Thank ahead for helping!

when i played around, I’ve tried

<?php if (is_category(‘4,5,6′)) {echo get_avatar( get_the_author_email(), ’60’; ?>} ?>

but I don’t think it work. I would still see the author’s avatar in a different category post. However, it does disappear from the front page and category posts list (when i click on a certain category).

what i want is for it to appear only on a certain category, even on the front page. ex: on front page and category page (when you see posts list), show only when it’s a post that belongs to it’s category