Canada Goose Holdings Inc. reported the following amounts: Canada Goose Holdings Inc. $($amounts in millions$)$

$202020192018$

Total assets $$1,112\mathrm{.}7$ $$725\mathrm{.}4$ $$548\mathrm{.}4$

Total shareholders$$ equity $520\mathrm{.}2399\mathrm{.}1243\mathrm{.}6$

Sales revenue $958\mathrm{.}1830\mathrm{.}5591\mathrm{.}2$

Net income $151\mathrm{.}7143\mathrm{.}696\mathrm{.}1$

Required

i$.$ Calculate the following ratios for the years $2020$ and $2019,$ and explain what you find:

a$)$ Profit margin ratio

b$)$ Return on assets

c$)$ Return on equity

ii$.$ Explain whether each of these ratios has improved or worsened from $2019$ to $2020.$