US Immigration from Niger

hi guys I have a question to ask,any help will be appreciated. I applied for my mom i130 on June 17 2020,online,and i just just checked and I see I have received to add more Evidence, but the letter only stated my name saying I submitted my birth certificate in English only,and they want me to submit the original in foreign language and the English language. So my question is do I only upload the responses online or sent them only via mail or do both.

Thanks guy good luck for everyone..???

Hey guys I start filling out the i400 application online, but i got some fews questions to ask if I can get hell please.its asked me my online uscis account number and said not the Alien number. So my question is.1. what's the online uscis account number?2.its asking me all the place I worked for the last 5yr,which I knw the places and their address but I can't remember all the date I started and ended. So its required to have the date or not.

Any answer will appreciate

Thanks guys