Help with 16 & 17 please!!

16. Give the product of the sequence of reactions. Draw each step product to the side, in a column, and the final product in box. 1. NaOEt,EtOH, 2. HBr 3. NaOEt,EtOH, 4. O3,CH2Cl2 5. DMS 17. Give the missing compounds for the following reactions, show stereochemistry where necessary. Try not to refe to the reference sheet and see if you remember these. You should check yourself with the posted handout. 1. 2. isopropyliodide 3. 4. 1. ROORHBr means wedge or dash 2 products one is major which one