Welcome to Westonci.ca, the place where your questions find answers from a community of knowledgeable experts. Experience the ease of finding quick and accurate answers to your questions from professionals on our platform. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

write a function that returns the sum of all the elements in a specified column in a matrix using the following header: def sumcolumn(m, columnindex): write a main function that prompts the user to enter a 3-by-4 matrix of numbers, calls the above function, and displays the sum of each column.