Need full answers and how to. 1. Write the domain and range of the function using interval notation.2. Use the graph of the function to estimate the intervals on which the function is increasing or decreasing. (Enter your answers using interval notation.)3. Consider the graph shown below.4. Use the graph of the function to estimate the local maximum and local minimum of the function. (Round your answer to two decimal places. If an answer does not exist, enter DNE.)5. Consider the graph shown below.6. Use the graph of the function to estimate the local maximum and local minimum of the function. (Round your answer to two decimal places. If an answer does not exist, enter DNE.)7.The graphs of the functions (a) Find (f · g)(1).(f · g)(1) = (b) Find (f − g)(0).(f − g)(0) = 8. Use the graph of f, shown below, to evaluate the expression.f(f(5))