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

where Y = a + bX + by X+b3x3 Y = number of automobile accidents a=7.5 b = 3.5 b = 4.5 bj = 2.5 Calculate the expected number of automobile accidents under con- ditions

a, b, and c: X

(a) 2 3 0

(b) 3 5 1

(c) 4 7 2