Workout tips for toned arms

Give this little workout a go:

a. Dumbbell external rotation 10 reps – 4 sets, tempo 3; 0; 2; rest 30 seconds
b. Incline dumbbell preacher curl 10–12reps – 4 sets, tempo 3; 0; 1
c. Tricep rope pushdowns 15 reps – 4 sets, tempo 2; 0; 2; rest 45 seconds
d. Scott curl reverse biceps curls 8–10 reps – 4 sets, tempo 2; 0; 2
e. Overhead dumbbell triceps extension 12–15 reps – 4 sets, tempo 2; 2; 1; rest 45 seconds