To open a combination lock, you turn the dial to the right and stop at a number; then you turn it to the left and stop at a second number. finally, you turn the dial back to the right and stop at a third number. if you used the correct sequence of numbers, the lock opens. if the dial of the lock contains 7 numbers, 0 through 6, determine the number of different combinations possible for the lock. note: the same number can be reused consecutively.