Use the excel to solve the following problem using RK and Modified Euler method and show the Excel spreadsheets. Also, show the formula used for calculations in each column's first cell:

The barometric pressure y (in inches of mercury) at an altitude of x miles above sea level decreases at a rate proportional to the current pressure according to the model dy = -0.2y dx Where y = 29.92 inches when x = 0. Find the barometric pressure at the top of Mt. Helens (31680feet) using a size h = 0.12. Exact solution by integrating factor method is given as y = 29.92e 5 The barometric pressure y (in inches of mercury) at an altitude of x miles above sea level decreases at a rate proportional to the current pressure according to the model dy = -0.2y dx Where y = 29.92 inches when x = 0. Find the barometric pressure at the top of Mt. Helens (31680feet) using a size h = 0.12. Exact solution by integrating factor method is given as y = 29.92e 5