Agood friend of yours is planning to install a new concrete walkway around his backyard swimming pool. the pool measures 25 feetlong by 15 feet wide, and the width of the walkway is to be the same all the way around. your friend is trying to determine how wide tomake his walkway and needs your advice.1. construct a diagram of the pool and walkway, labeling all known and unknown dimensions.2. write a polynomial expression to model the square feet of concrete needed3. determine how much concrete is needed if the walkway isa) 4 feet wideb) 5 feet widec) 6 feet widebe sure to show your work4. determine the price for #3 - parts a, b, and c given that the price per square foot of concrete is $25. be sure to show your work.1. which sidewalk width would you recommend for your friend and why?