Please Show All Work!

Check the following combinations of puts and calls, determine whether they conform to the put-call parity rule for European options, and identify violations, if any. a. July 155 b. August 160 c. October 170

Examine the following pairs of American calls which differ only by exercise price. Determine whether the rules regarding relationship between American calls that differ only by exercise price are violated. a. August 155 and 160 b. October 160 and 165

Examine the following pairs of American puts which differ only by exercise price. Determine whether the rules regarding relationship between American puts that differ only by exercise price are violated. a. August 155 and 160 b. October 160 and 170