Please help. Its very confusing

Assignment: Adapt the code you wrote to compute a 2D resultant force to a program that will compute the resultant of a 3D system. There are a few differences. First, the program needs to be able to import any number of forces, from 1 up to infinite. Second, the vectors supplied in the excel file need to be in i,j,k columns instead of magnitude and direction columns. An example of how the excel spreadsheet will be assembled is the following for a 5 vector system: 6 2314 .15 12 9 4 4 Your program will use the "plot3" function in MATLAB to plot every vector in the input file, and the resultant force. The resulting plot should look similar to the following