Please help I’ll make you the brainiest (please NO LINK PEOPLE PLEASE)

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Find the value of x for which line a is parallel to line b

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6