Forests are complex, evolving ecosystems. For instance, pioneer tree species can be displaced by successional species better adapted to the changing environment. Ecologists mapped a large Canadian forest plot dominated by pioneer Douglas fir with an understory of the invading successional species western hemlock and western red cedar. The twoway table records the distribution of all2050trees in the plot by species and by life stage. The distinction between live and sapling trees is made for live trees taller and shorter than1.3meters, respectively.

Dead Live Sapling Total

Westernredcedar(RC) 0.02 0.10 0.08 0.20

Douglasfir(DF) 0.16 0.16 0.00 0.32

Westernhemlock(WH) 0.23. 0.21 0.04 0.48

Total 0.41. 0.47 0.12

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What does the given data say about the current composition and the evolution of this Canadian forest?

(a) Compute the conditional probabilities that a randomly chosen tree is dead given information about its species, for each of the three tree species in this forest. (Enter your answers rounded to three decimal places.)

(deadRC)=_______; (deadDF)=________; (deadWH)=________

(b) Compute the conditional probabilities that a randomly chosen tree is a sapling given information about its species, for each of three tree species. (Enter your answers rounded to three decimal places.)

(saplingRC)=________; (saplingDF)=_________; (saplingWH)=_______