After solving the Square distance problem in 3 different ways ,each time I got 50% mark and the following message :Code Cell UNQ_C2 failed: sq_dist test 2 failed .

“If you see many functions being marked as incorrect, try to trace back your steps & identify if there is an incorrect function that is being used in other steps.

This dependency may be the cause of the errors.”

I think my defining a and b are wrong

1st time:

a = np.random.rand(10)

b = np.random.rand(10)

d =

return d

2nd time:

a= np.array((1,2,3))

b= np.array((4,5,6))

d =

return d

3rd time:

Without define a and b I wrote square distance formula with a and b

since def sq_dist(a,b):

so,

d=

return d

How can I fix the problem?