Question 3 of13 View Policies Current Attempt in Progress Using integration by parts, nd the Laplace transform of the given function; a is a positive integer and a is a real constant. fa) = tne' Question 4 of 13 View Policies Current Attempt in Progress Find the Laplace transform of the given function; b is a real constant. f (t) = cos(bt) Your answer should be an expression in terms of b and s. NOTE: Your answer must be fully simplified. It cannot contain i. Lif (t) } (s) = F(s) =