Can anyone please help me please ?​

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.