If i drink coffee then i will get a lot done
if i don't drink coffee then i'm sleepy
if i am sleepy then i'm irritable therefore
if i don't get a lot done then i'm irritable

check if the argument is valid or invalid

Aplot of land in the shape of a vertical ellipse has a pole at each focus. the foci are 8 feet from the center. if the plot of land is 34 feet across the vertical axis, then it is (a.24 b. 30 c. 32 d. 36) feet across the other axis. the eccentricity of the ellipse traced by the boundary of this plot, rounded to the nearest thousandth, is (a.0.543 b.0.515 c.0.471 d. 0.459)