The prepaid insurance account had a balance of $5,600 at the beginning of the year. The account was debited for $1,800 for premiums on policies purchased during the year. Journalize the adjusting entry required at the end of the year for each of the following situations:

(a) The amount of unexpired insurance applicable to future periods is $3,680;

(b) The amount of insurance expired during the year is $3,720.