please explain 13-9 and 13-10 both with full steps?

accnt2

OS 139 Weighted-average common shares outstanding-share split 03 Xcel On January 1, Star Corp had 50.000 common shares issued and outstanding on April 1, it issued 4.000 additional shares, and on June 5 declared and distributed a two for one share split. Calculate Star's weighted average outstanding shares for the year OS 13-10 Weighted average common shares outstanding-repurchase 103 excel On January 1, 2020, Winston Mining Corp, had 580,000 common shares issued and outstanding on April 30, issued an additional 220,000 shares, and on October 1st repurchased and cancelled 100,000 shares Calculate Winston's weighted average shares outstanding for the year ended December 31, 2020. Round calculations to the nearest whole share