Part 1:

Twinkle, Twinkle little star.
Twinkle, Twinkle little star.
cheese, cheese little strawberries.

Part 2:

10 + 7 = 17
10 - 7 = 3
10 * 7 = 70
10 / 7 = 1.4285714285714
10 % 7 = 3

Part 3:

Value is now 8.
Value is now 10.
Value is now 6.
Value is now 30.
Value is now 10.
Value is now 11.
Value is now 10.


Part 4:

What goes around comes around.