1.1 Please draw the Lewis structure of the follow compounds. (3 point) 1) H2S 2) CH3NH2 3) CH3CHO 1.2 Please write the IUPAC-name for the follow compounds, figuring out R/S structure when relevant. ( 2 point) 1.3 Please draw the structural formula for the following compounds. (2 point) a) (Z)-1-chloro-2-methylbut-1-ene b) cis-1,3-dibromocycloheptane 1.4 Please mark the chiral center(s) in the structural formula of Ampenicillin and write the possible amounts of stereoisomers of it. (2 point)