1- Based on the limited information provided below, how would you determine weighted average number of common shares outstanding? (Show the calculation)

Beginning of the year common shares 15,000

End of the year common shares 25,000

2- Based on the limited information provided below, calculate the weighted average number of common shares outstanding? (Show the calculation)

Beginning of the year common shares 15,000

On July 1, 10,000 additional shares were sold

Thank you!