Answer:
Not affected
Step-by-step explanation:
Given: Shortly after Samantha sold her shares, the price per share increased by
. Another investor in the corporation, Jeffrey, owned
shares of Graham Corporation. A
reverse stock split was announced.
To Find: how was Jeffrey financially affected by the split.
Solution:
Number of shares Jeffrey had 
Let the stock value of share after Samantha sold her share 
Total value of Jeffrey's shares 
As a
for
stock split was announced
Each
share is merged into
shares and value of share is increased in respective ratio such that

Now,
Number of share Jeffrey had after split 

Stock value of share after split 
Total value of Jeffrey's shares 
As the value of Jeffrey's stock before and after split is same therefore Jeffrey is not financially affected by the split.