The number of auto accidents in Athens, Ohio, is related to the regional number of registered automobiles in thousands (X1), alcoholic beverage sales in $10,000s (X2), and rainfall in inches (X3). Furthermore, the regression formula has been calculated as:

Y=a+b1X1+b2+X2+b3X3Y=a+b1X1+b2+X2+b3X3

where

Y=number Of auto mobile accidents

a=7.5

b1=3.5

b2=4.5

b3=2.5

Calculate the expected number of automobile accidents under conditions a, b, and c:

X1 X2 X3

(a) 2 3 0

(b) 3 5 1

(c) 4 7 2