B2 Programming fundamentals and data structures

What does this program print?

total = 0
for i in range(1, 5):
    if i % 2 == 0:
        total = total + i
print(total)

The values 4, 7 and 9 are pushed onto an empty stack in that order. Two values are then popped. Which value is popped second?

An invented school trip program records, for each student, whether a signed permission form has been returned. Which data type fits this value best?

The program takes a substring of a word and joins a number to it. What does it print?

word = "PROGRAMMING"
part = word[3:7].lower()
print(part + str(len(word)))

This code should print the whole-number average of the four marks (integer division: // in Python, / between two ints in Java). The total is 30, so it should print 7, but it prints 6. Which change fixes it?

marks = [6, 8, 7, 9]
total = 0
for i in range(1, len(marks)):
    total = total + marks[i]
print(total // len(marks))