Question: onsider the following code: A = np . random.randn ( 4 , 3 ) B = np . sum ( A , axis = 1

onsider the following code:
A = np.random.randn(4,3)
B = np.sum(A, axis =1, keepdims = True)
What will be B.shape? (If youre not sure, feel free to run this in python to find out).
(4,1)
(4,)
(1,3)
(3,)

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