Cross off any redundant (unneeded) portions of the code. (The resulting code should always yield the same results, regardless of the input which COULD be outside the specified range.) grade = input ('Enter the grade from 0 to 100: '): if grade > 80 && grade 100 disp 'Invalid input') elseif grade = 0 disp('Sorry - you blew it') elseif grade > 60 && grade 50 && grade 90 && grade 70 && grade