Newton Inc. uses a calendar year for financial reporting. Listed below is a summary of Newtons common stock activities. At no time has Newton issued any potentially dilutive securities.

Number of common shares authorized			9,000,000
Par value of common stock			$ 10.00

Number of common shares issued and outstanding at December 31, 2015					2,000,000
Shares issued as a result of a 10% stock dividend on September 30, 2016					200,000
Shares issued for cash on March 31, 2017					2,000,000
Number of common shares issued and outstanding at December 31, 2017					4,200,000

A 2-for-1 stock split of Newtons common stock took place on March 31, 2018.

(a)	Compute the weighted-average number of common shares used in computing earnings per common share for 2016 on the 2017 comparative income statement.

(b)	Compute the weighted-average number of common shares used in computing earnings per common share for 2017 on the 2017 comparative income statement.

(c)	Compute the weighted-average number of common shares to be used in computing earnings per common share for 2017 on the 2018 comparative income statement.

(d)	Compute the weighted-average number of common shares to be used in computing earnings per common share for 2018 on the 2018 comparative income statement.