You have written good FORTRAN programs this semester. However, they have not been modular and structural as they should. Probably because by the time you wrote them you did not know about functions. For this assignment, you are to re-write Programs 3 and 4, applying modular structural programming. For each assignment you are to write the shortest possible driver program, basically only for input/output and interaction with users/files. All the computations are to be delegated to dedicated functions. The interfaces for both programs will remain as assigned before.