Plz answer each of them thanks so much

11.3 cont. and 11.4 11. For each of the following iterated integrals, . sketch the region of integration, . write an equivalent iterated integral expression in the opposite order of integration, . choose one of the two orders and evaluate the integral. a. [ rudyda d. [. ztydady 11.4.6 Exercises 4. Find the mass of the triangular region with vertices (0, 0), (4, 0), and (0, 1), with density function p (x, y) = x2 + y. Make Interactive 8. A lamp has two bulbs, each of a type with an average lifetime of 2 hours. The probability density function for the lifetime of a bulb is f(t) = ze */2, t > 0. What is the probability that both of the bulbs will fail within 5 hours? Make Interactive