this is just a practice sheet. can someone answer in a detailed manner please?

Organic Chem I Spring 2023 WORKSHEET 4 Name 1. Fill in the structures to show the two chair conformations of cis-1-bromo-3-isopropyleyclohexane. Circle the most stable conformation. 2. Fill in the structures to show the two chair conformations of trans-1-bromo-3-isopropyleyclohexane. Circle the most stable conformation. 3. Fill in the structure to show the most stable confomation of cis-1-fluoro-2-iodocyclohexane. 4. The two most stable conformations of 2 -methylbutane along the C2 - C3 axis are shown below. Circle the conformation with the lowest cnergy. (A) (B) Organic Chem I Spring 2023 WORKSHEET 4 Name 1. Fill in the structures to show the two chair conformations of cis-1-bromo-3-isopropyleyclohexane. Circle the most stable conformation. 2. Fill in the structures to show the two chair conformations of trans-1-bromo-3-isopropyleyclohexane. Circle the most stable conformation. 3. Fill in the structure to show the most stable confomation of cis-1-fluoro-2-iodocyclohexane. 4. The two most stable conformations of 2 -methylbutane along the C2 - C3 axis are shown below. Circle the conformation with the lowest cnergy. (A) (B)