Can you please answer these two questions for me thank you so much

Calculus AB. Semester 2 Assignment: Applications of Differential Equations 4. At high temperatures, nitrogen dioxide, N02. decomposes into N0 and 02. If yin is the concentration of N0: [in moles per liter), then at 600%. 3-1:) changes according to the reaction law % = _05}-'3 for time rin seconds. A. Express y in terms of r and the initial concentration y,. B. Assuming that the concentration of N03 is twice as high at: = 20 seconds as it is at 100 seconds nd the exact initial concentration of the N03. Reminder: "Exact" means no calculator numbers. Calculus AB, Semester 2 Assignment: Applications of Differential Equations 3. The slope of a curve is equal to y divided by4 more than x3 at any point [x,y) on the curve. A. Find a differential equation describing this curve) B. Solve the differential equation from part A. C. Suppose it's known that asx goes to infinity on the curve y goes to I. Find the equation for the curve by using part B and determining the constant. Explain all reasoning