I need help with these 3 questions related to Riemann sums. Thank you.

4 (4) Find an estimate of the area under the graph of y = esina between x = 0 and x = 7. Use two midpoint rectangles. (5) Use elementary geometry to find the area under the graph of y = 5x + 3 between x = -1 and x = 5. Sketch a picture. (6) The velocity v(t) of an object is sketched below. Estimate the total distance travelled by an object between t = 0 and t = 4. 2 1 10 1 2 3 4