cells = 1

for i in range(1, 25):

   if i % 3 == 0:

       cells *= 2

       print(cells, end = " ")

____________________

banked = 1000

for i in range(1, 13):

   if i <= 10: #a)

       print(increasement)

   if i >= 3:  #b)

       print(banked)

   increasement = banked * 0.02

   banked += increasement

____________________

length = 10

sum = 0

for i in range(1, 13):    

   if 2 <= i <= 10: #a)

       print(length)

   if i <= 7:  #b)

       sum += length

   increasement = length * 0.1

   length += increasement

print(sum)