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This might not follow the sequence of your screen grab but it does the same thing.
1.
[2nd] + [ICONV]
You should see “NOM” which is the nominal rate, key in 10 and press [ENTER].
2. press arrow down twice till you see C/Y
type in 12 and press [ENTER] (that’s amount of times to compound a year)
3. press arrow UP to “EFF”.
That’s the effective rate, press CPT to get the EAR.