The homework question I have is"For the second, fourth, sixth, and seventh levels of the three-dimensional cubical box, find the energies in terms of the quantity E0 π2ℏ2/(2mL2), where m is the particle mass and L is the box's sidelength."However, I'm not confused on how to solve it. The question I have is this - in this situation, how would I determine what the nx, ny, and nz would be for each new energy level? I know you can use a table, but I'm not going to have that in a test situation. How do I determine that the 6th energy level should be (3^2 +2^2 +1^2)?

Clara is shopping in a grocery store with her friend. each has their own shopping cart in which they want to place their items. the shopping carts are identical. clara and her friend add the same type and number of items to each of their carts. in the baking aisle, however, clara adds 20 pounds of sugar to her own cart, and her friend adds only 10 pounds of sugar to her own cart. which of the following statements best explains what clara must do to accelerate at the same rate as her friend? a. she must add more sugar to her cart. b. she must apply more force to move her cart. c. she must add 20 pounds of salt instead of 20 pounds of sugar to her cart. d. she must apply less force to move her cart.