Please explain step by step

4. Find the relative extreme points of the function. if they exist. Then sketch a graph of the function. 900 = 3x3 + 2x4 Identify all the relative minimum points. Select the correct choice below and, if necessary, ll in the answer box(es} to complete your choice. 0 A- The relative minimum point(s) islare (Simplify your answer. Use integers or fractions for any numbers in the expression. Type an ordered pair. Use a comma to separate answers as needed.) O B. There are no relative minimum points. Identify all the relative maximum points. Select the correct choice below and, if necessary, ll in the answer box(es) to complete your choice. 0 A- The relative maximum point(s) isiare (Simplify your answer. Use integers or fractions for any numbers in the expression. Type an ordered pair. Use a comma to separate answers as needed.) O B. There are no relative maximum points. Choose the correct graph below.3x3 + 2x4 OA. 03