Use the left Riemann sum with 2 subintervals to estimate the areas between dy/dx = lnx and the x axis from x = 1 to x = 2. Now use this value to...

Use the left Riemann sum with 2 subintervals to estimate the areas between dy/dx = lnx and the x axis from x = 1 to x = 2. Now use this value to sketch y = f(x) if f(1) = 3. 

Please show all work and calculations on how you draw the graph and solve the problem.