Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to use robinhood [title] Download the app. [step] Start by going to the app store and downloading the robinhood app there. [title] Get an invitation.

Ending1: [step] Robinhood uses an invitation system to ensure no errors occur as new customers join. When you receive an invitation, you will receive an email and a notification in the app. Ending2: [step] After downloading, type in " robinhood (). " if you're at home, tap on " wanna host? " to be invited to your house. Ending3: [step] In the red bar beside " admittance " at the top, tap " invite ". [title] Open a window on the homepage. Ending4: [step] After downloading this app, get to know it a bit more and shop for a 3.0% membership in robinhood. Just after opening the app, click on the' invite to membership' button, which is located on the upper right corner of the app.

Answer format: ending1/ending2/ending3/ending4