Answer:
4. $3.00...$2.73
Explanation:
Basic EPS = Net income/average number of shares outstanding
         = 1500000/500000
         = $3 per share
Diluted EPS = 1500000/(500000 + 50000)
          = $2.73 per share
Therefore, Colt should report earnings per share for 2018:
Basic Earnings Per Share of $3
Diluted Earnings Per Share of $2.73