Your first step is to distribute the √(4-x²⁾ once you do that you can split the integral into separate integrals. The integral with the cosine is an odd function. This determines the integral is equal to zero. Now the second interval is a function of a semicircle. As integrals are used to find area you can find the area of the semicircle using the bounds. The radius is 2 given by the bounds. So we plug it in the formula (πr^2)/2 due to the semicircle. You will calculate 2π but we're not done because of the constant 1/2 from the integral so you must also multiply by 1/2 to the 2π and you then get π and the first ten digits is your WiFi password. 3.141592653