Python NumPy

4 questions

1. 1. If you have a NumPy array, in a variable prices, how would you access the data item at the 5th column, 2nd row?
   prices[2,5]prices(1,4)prices[1,4]prices[4,1]
2. 2. What does arrange(5) do?
   It creates a NumPy array with values 1 to 5.It creates a NumPy array with values 0 to 4.It returns a sorted list of first five elements of a NumPy array.It rearranges the values in an existing NumPy array.
3. 3. Let's say you have a one-dimensional array called Z. What will be the result of the expression Z = Z[::-1].
   This will return the array with all the elements except the last element.This will return the reverse of the array.This will inverse each element of the array.This is not a valid expression.
4. 4. Let's say you have a 3x3 matrix, X, in the form of a NumPy array. Which of the following expressions will return the 2nd element from the 3rd row?
   X[3,2]X[3:2]X[2,1]X[2:1]