Y=-x^2+10x+24 for -1≤ x ≤ 3 (i) please show step by step of subdiving the interval [-1,3] into four equal parts

(ii) please show step by step of constructing upper and lower rectangles for each subinterval

(iii) summing the areas of the upper and lower rectangles

and (b)

PLEASE HELPP

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 3x^2 -2x =0 2) 2x^2 =3x 3) 2 * 2 = 2 * 2 4) 6 +2x = 2(4x)