Compound $4.$ What is the molecular weight of the compound $($M$+$ peak$)?$ Which compound or compounds are suggestedby this information? Discuss what the $($M$+2)+,$ and $($M$+4)+$ peaks suggest about halogen content $($e$.$g$.,$ chlorine vs bromine orone bromine atom vs two bromine atoms$).$ Which compound or compounds are suggested by this information? If relevant for this compound, how can you use NMR and IR data to distinguish between differentcompounds with identical molar masses $($e$.$g$.,1,2-$dibromobenzene vs $1,3-$dibromobenzene vs $1,4-$dibromobenzene