How many stressed syllables are there in each line of the poem?

Question

Nature’s first green is gold,

Her hardest hue to hold.

Her early leaf’s a flower;

But only so an hour.

Then leaf subsides to leaf.

So Eden sank to grief,

So dawn goes down to day.

Nothing gold can stay.

Answer 1

Three

NAture's first GREEN is GOLD

her HARDest HUE to HOLD

her EARly LEAF'S a FLOWer

but ONly SO an HOur

then LEAF subSIDES to LEAF

so EDen SANK to GRIEF

do DAWN goes DOWN to DAY

NOthing GOLD can STAY