Draw the structure of the major organic product for each of the reactions below. The image depicts four different chemical reactions with organic compounds and their respective reagents, leading to various reaction products.1. **Reaction 1:** - **Reactant:** Cyclohexanol (cyclohexane with an -OH group) - **Reagent:** PBr₃ in ether - **Product:** Box indicates that the product needs to be determined; typically, this reaction converts alcohols to alkyl bromides.2. **Reaction 2:** - **Reactant:** 3-Methyl-1-butanol (a primary alcohol) - **Reagent:** KMnO₄ - **Product:** Box indicates that the product needs to be determined; KMnO₄ usually oxidizes primary alcohols to carboxylic acids.3. **Reaction 3:** - **Reactant:** 1-Methylcyclohexanol - **Reagent:** H₂SO₄ (sulfuric acid) with H₂O - **Product:** Box indicates that the product needs to be determined; H₂SO₄ with water typically dehydrates alcohols to form alkenes.4. **Reaction 4:** - **Reactant:** 1,2-Benzoquinone - **Reagent:** SnCl₂ and H₂O - **Product:** Box indicates that the product needs to be determined; SnCl₂ in H₂O is often used to reduce quinones to hydroquinones.Each reaction involves different types of organic transformations, highlighting the diverse reactivity of functional groups in organic chemistry.

Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts for you. To get remaining sub-part solved please repost the complete question and mention the sub-parts to be solved. Each reagent reacts in a specific way. So by looking at the reagent we can identify the reaction.a) Alcohols can be easily converted into alkyl bromides by reacting with PBr3. Here substitution reaction occurs. According to the substrate the mechanism varies SN1/SN2. b) The oxidation of alcohols to acid occurs with KMnO4 reagent.c) The given substrate is a tertiary alcohol. Sulfuric acid and water gives elimination reaction instead of substitution reaction with tertiary alcohols. The major product formed will be Saytzeff product (more substituted product). Tertiary alcohols prefer E1 mechanism.