Please help me with calculus

In both of the questions below we will repeatedly exploit a basic property of integrals that we haven't focused on previously in the course. so it is worthwhile to highlight this property before we begin. If a function x) 2 (J is nonnegative for all .r- E [0. b]. then the denite integral [abdr is equivalent to the area hounded between the graph y = y). the raxis. and the vertical lines I = a and .I' = b. ' Also recall that if the function is negative for all .7: E [0. [I] (x)