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Question 3: Find a bound on the error in approximationg cach definite integral using the Trapezoidal Rule. a"'dx , n =8 Question 4: Let f(x, y) = alny + ylnx. Find /(1, 1), f(1, e), f(e, 1), and f(e, e). Question 5: The current dividend yield for common stock is calculated using the formula Y = (D. P) = where D is the most recent full-year dividend (in dollars) and I' is the current share price (in dollars). The annualized dividend of a corporation for the year 2019 was $4 and its price per share was $197.21 on April 7, 2020. What was the current dividend yield for the common stock at the time? Convert the decimal answer obtained for the current dividend yield into a percent