Exercise 3: Implement l2distance In this exercise, you will use the above formula to implement the function l2distance, which computes the Euclidean distance matrix without a single loop. Recall that the element-wise square of is of the form =+2 and the entries of are =[] Hint: Make sure that all entries of are non-negative after you take the square root [] because sometimes very small positive numbers can become negative due to numerical imprecision. Since all distances must be non-negative, you can simply overwrite all negative values with 0.0 to avoid unintended consequences