Assuming all variables used have already been declared, after the following program statements execute, $.$

guests $=15$

feePerGuest $=20$

reservationNumber $="3432"$

totalfee $=$ guests $+$ feePerGuest $+50$

$$ a$.$ ceservationNumber and totalFee hold string data

b$.$ any of the variables could be used to perform arithmetic operations

$.,$

feePerGuest, and totalFee all hold numeric data

d$.$ gues

$[$B$,$

fee PerGuest, and reservationNumber all hold numeric data