a. The gov. would announce that the real GNP would have grown 1.2%
during the previous quarter.  The returns of Lewis-Striden are
positively related to real GNP.
b. The gov. would announce that inflation over the previous quarter
was 3.7%.  The returns of Louis-Striden are negatively related to
inflation.

c. Interest rates would rise 2.5 percentage points.  The returns of
Louis-Striden are negatively related to interest rates.

d. The President of the firm would announce his retirement.  The
retirement would be effective 6 months from the announcement day.  The
President is well liked:  In general, he is considered an asset to the
firm.

e. Research data would conclusively prove the efficacy of an
experimental drug.  Completion of the efficacy testing means the drug
will be on the market soon.

SUPPOSE THE FOLLOWING EVENTS ACTUALLY OCCURED.
a. The government announced that real GNP grew 2.3% during the previous quarter.
b. The government announced that inflation over the previous quarter was 3.7%
c. Interest rates rose 2.1 percentage points.
d. The president of the firm suddenly died of a heart attack.
e. Research results in the efficacy testing were not as strong as
expected.  The drug must be tested another 6 months and the efficacy
results must be resubmitted to the FDA.
f. Lab researchers has a breakthrough with another drug.
g. A competitor announced that it will begin distribution and sale of
a medicine that will compete directly with one of Lewis-Striden's top
selling products.

i. DISCUSS HOW EACH OF THE ACTUAL OCCURENCES AFFECTS THE RETURNS ON
YOUR LEWIS-STRIDEN STOCK.
ii. WHICH EVENTS REPRESENT SYSTEMATIC RISK?
iii. WHICH EVENTS REPRESENT UNSYSTEMATIC RISK?

You are asking for in depth discussions of 7 different situations. 
That would be $2 per answer, not much incentive for a Researchers.

I think you should read the FAQs on pricing   - and especially on homework.

For $14 dollars?

Do those events occur simultaneously ?