Draw the structure of following compounds:
a. 2-Isopropyl-7-chlorobicyclo `[2.2.1]` heptane
b. 6-Ethan-3-Iodo bicyclo `[3.2.0]` heptane
c. 3-Methan tricyclo `[3.2.1.0]` ocation-3-ol
d. 1,4,6,9-Tetramethyl spiro `[4.4]` nonane
e. Bicyclo `[2.2.1]` heptane

Explanation

a. b.