is Just 4 question but can some one explain a little bit , please.

OH Vitamin A retinol 11. Add all the missing hydrogen atoms to the line angle formula shown above. (When you add the hydrogens, try to represent the bond angles somewhat accurately (109 for tetrahedral carbon and 120 for trigonal planar carbon), Review line angle formulas in Chapters 10 and 11 as needed. You can draw in the carbon atoms, too, if you want to make it easier to see where to add hydrogens. 2. Label each of the double bonds in retinol as either cis or trans by writing a small cort in the middle of each double bond. There are 5 double bonds. Refer to Chapter 12 as needed to review cis-trans isomers in double bonds. For rings, it is the ring that defines how the longest chain proceeds through the double bond, so the double bond inside the ring is cis and should be labeled with a c. 3. Is retinol a primary, secondary, or tertiary alcohol? (Review Alcohols in Chapter 10.) Circle the correct choice. 4. Is vitamin A a water soluble or fat soluble vitamin? Explain your answer in your own words, based on the structural formula of Vitamin A. Describe the types of intermolecular interactions involved. "Internet" answers will not be accepted. (Review solubility of covalent compounds in Chapter 6 as medad Vitamin A, also known as retinol (C20H300), is an unsaturated alcohol. Good sources are liver, butter, egg yolks, carrots, spinach, and sweet potatoes. It is important in vision and in healing of eye and skin injuries. Its structure is shown below in the line angle form. 1 OH Vitamin A retinol