3. An unknown compound gives the mass spectrum below. Assuming that it has only carbons and hydrogens in the structure, answer the following questions. a. What is the molecular formula for this compound? b. What are the degrees of unsaturation for this compound? c. When a solution of Br2 in CCl4 is added to the unknown, the bromine color disappears. What information does this provide about the structure of the unknown? d. The unknown reacts with excess H2 in the presence of Pd/C to give C6H12. What information does this provide about the structure of the unknown? e. When the unknown is reacted with BH3 in the presence of THF and subsequently treated with hydrogen peroxide and sodium hydroxide, a primary alcohol is formed. What is the structure of the unknown