Select the systematic name for each of the following compounds. 2-isopropylbenzaldehyde or ortho-isopropylbenzaldehyde ortho-isopropylbenzene meta-isopropylbenzene 3-isopropylbenzaldehyde or meta-isopropylbenzaldehyde 2-bromotoluene or ortho-bromotoluene 2-ethyl-1-bromobenzene 2-bromo-1-methylcyclohexene 3-bromotoluene or meta-bromotoluene 2,4-dinitrobenzene 2,4-nitrophenol 2,4-diaminophenol 2,4-dinitrophenol