Marketing HW Excel Sheet need with work shown

HE Cust data

Year	# Customers Alive
0	1000
1	869
2	743
3	653
4	593
5	551
6	517
7	491
8	462
9	435
10	410
11	392
12	374

# Customers Alive

# Customers Alive 0 1 2 3 4 5 6 7 8 9 10 11 12 1000 869 743 653 593 551 517 491 462 435 410 392 374

Year

# Alive