Did you click the star tag link on the right? If you had, you would have come up with plenty of hits, such as this one where I gave code to draw a star:
If you have R2018a or later, use the bandstop (link) function. Cascade two filters, one for each frequency. If you use the second ‘d’ (digital filter object) output, use the filtfilt function with it to filter your signal.
Using kaiserord (link) with fir1 is also an option. You can design the filter to eliminate both frequencies at the same time.
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