Please write an inequality based on the following problems, and let [variable] = the things in parentheses:
Harry, who is not yet 16 years old, is three years younger than Lena. (Lena's age)
After driving 125 miles, Barry still has more than 75 miles to travel. (The total # of miles Barry will drive)
Dan bicycled 12 more kilometers than one-third the number of kilometers Manuel bicycled. Dan bicycled at most 24 km.