An arithmetic sequence with a common difference of -0.25 and a first term of 6

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Sum is 17 and their difference is 3

Ineed to know the answer to this algebra question.