$4.$ Read the following program:

LDD #$$9257$ ;D$$$$9257$

ADDD #$$81$AC ;D$[$D$]+$$$81$AC

STD $$1001$ ;$$1001$~$$1002[$D$]$

LDAA #$$5$A ;A$$$$5$A

ADCA #$$3$D ;A$[$A$]+$$$3$D$+$C

STAA $$1000$ ;$$1000[$A$]$

END

After executing the program:

$1)$ What is the purpose and final results of this program?

$2)$ What are the contents stored in memory locations $$1000$ and$$1001?$

$3)$ What is the ultimate status of Carry Flag in CCR $($condition code register$)?$