Write each of the following in the simplest form or as a√b, where a and b are integers, b>0, and b has the least value possible. a.-189 √/56 C. b. √/486 d. 5√-243 a. Write - 189 in the simplest form or as √√b. 3-189 = (Simplify your answer. Type an exact answer, using radicals as needed.) b. Write √486 in the simplest form or as √b. 5√/486 = (Simplify your answer. Type an exact answer, using radicals as needed.) c. Write √56 in the simplest form or as √/b. √√56 = (Simplify your answer. Type an exact answer, using radicals as needed.) d. Write 5√-243 in the simplest form or as √/b. 5√-243 = (Simplify your answer. Type an exact answer, using radicals as needed.)