In path-goal theory, the main components are and

Leader style, follower characteristics, work setting Leader style, follower characteristics, and work setting.
In path goal theory, an organization will set its leadership style according to what best fit the employees and the work environment  where they operate in order to increase employees' motivation

$3.48

Explanation:

Net income ÷Shares of common stock outstanding + Preferred stock convertible shares of common stock.

Net income 6,800,000

Shares of common stock outstanding 1,200,000

Preferred stock convertible 750,000

Hence:

$6,800,000/ ($1,200,000 + $750,000)

=$6,800,000/$1,950,000

=$3.48

Therefore the diluted earnings per share for 2021 is $3.48