Sam‘s final grade for an class is based on his sores form a midterm test (m), a project (p) and a final exam ( f). the midterm test counts twice as much as the project, and the final exam counts twice as much as the midterm. which mathematical expression below can be used to calculate sam‘s final grade?
a. p+m+f
b. p+2m+4f
c. p+2m+f
d. p+m+2f