Which of the following statements correctly describes the position of the intake and exhaust valves during most of the power stage in a four-cycle gas engine?
a. both the intake valve and the exhaust valve are open.
b. the intake valve is open and the exhaust valve is closed.
c. the intake valve is closed and the exhaust valve is open.
d. both the intake valve and the exhaust valve are closed.

the first, second, and fifth options

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50