Draw the structure of the sigma-complex intermediate with an electron donating substituent at the meta-position to the incoming electrophile. Show the electrophile as "E" and the substituent as "R". Does the sigma-complex have a positive charge at the carbon bearing the electron donating substituent?

Draw the structure of the sigma-complex intermediate with an electron donating substituent at the para-position to the incoming electrophile. Show the electrophile as "E" and the substituent as "R". Does the sigma-complex have a positive charge at the carbon bearing the electron donating substituent?

Draw the structure of the sigma-complex intermediate with an electron donating substituent at the ortho-position to the incoming electrophile. Show the electrophile as "E" and the substituent as "R". Does the sigma-complex have a positive charge at the carbon bearing the electron donating substituent?

Any extra information on it would be super helpful as I'm struggling to understand these concepts!

Mechanism of Electrophilic Aromatic Substitution step 2 step 1