4. Store the annual sales that were registered in the "GOYO" Store, in a 4X4 matrix of real type. The four columns will be the cuts by quarters and the four rows will be the years that have been recorded lately: That is to say: Store "GOYO" Tri1 Tri2 Tri3 Tri4 2016 v1 v2 v3 v4 2017 v5 v6 v7 v8 2018 v9 v10 v11 v12 2019 v13 v14 v15 v16 Where the "v" s are the sales that are recorded in the arrangement from the keyboard. A. Obtain the total sale of Quarter 1 for the four years. Show the result. B. Obtain the total sale of the year 2018. Show the result. C. Get the average of all sales. Show the result. Write the complete source code for exercise 4.