Can someone please help me for the part b???!!! ASAP??!!!

Use the following information to complete parts a. and b. below. f (x) = (1 +x) 1/2 . ;approximate 1.17 1/2 .. . . . The first term is 1. (Simplify your answer. Use integers or fractions for any numbers in the expression.) X The second term is 2 (Simplify your answer. Use integers or fractions for any numbers in the expression.) 3 The third term is 8 (Simplify your answer. Use integers or fractions for any numbers in the expression.) rc 5 The fourth term is 16 (Simplify your answer. Use integers or fractions for any numbers in the expression.) b. Use the first four terms of the series to approximate the given quantity. 1.17 ~ (Round to three decimal places as needed.)