I can't see the output, pls see pics below Somehow, an asterisk appeared where a number used to appear, and shift +enter don't seem to be working.. I am not sure if I have pressed something, but I can't find it. Please help..

Hi Helen! Thanks for reaching out. You have to restart the kernel - Kernel -> Restart. Then, you can run the code again. Hope this helps. Best, Tsvetelin

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