Correct the logic errors in the code below.

# Add numbers entered until sentinel -1 is encountered.

n = int (input("enter a number"))

sum = 0

while (n == -1):

sum = sum + n

n = int(input("enter a number"))

Someone wrote the following code, intending to print 10 20 30 40.

arr = [10, 20, 30, 40]

for index in range (1,5):

print(arr[index])

What went wrong when it was run?