Please use MATLAB and explain your work for all 3 functions. Please do not use built-in functions, write out loops and simple operations (like addition, subtraction, multiplication, division)

Create a Matlab function called myabsolutevalue that inputs a real number a and outputs the absolute value of a. Use a if-else statement to return the result, dont use Matlabs built in function.

I need help with programming in MATLAB.Can you create a function where cartesian coordinates (x,y,z,vx,vy,vz) are transformed into Kepler elements (a, e, i, raan, argp, f) and then create another function where those Kepler elements are tranformed back into cartesian coordinates.

I need help with MATLAB programmin. I am having a hard time with plotting in MATLAB. The following outputs a plot of the earth with a orbit inside it. The problem is that the calculations in the orbit do not include the radius of the earth. How do I increase the radius of the orbit by the radius of the earth to make the orbit outside of the earth. I tried adding the earth's radius to the x,y,z coordinates, but that only changes the place of the orbit in the plot not the radius.   % Given parametersomega_earth = rad2deg(7.2921151467e-5);period_of_repetition = 1 / 2;ecc = 0.74;inc = 63.4349;raan = -86.915798;argp = 270;f = linspace(0, 360, 100);mu = 398600.4418;t = 0:99; % Calculate semi-major axisa = ((omega_earth * period_of_repetition) / (360))^(-2/3); % Calculate periapsis and apoapsis distancesperiapsis_distance = a * (1 - ecc);apoapsis_distance = a * (1 + ecc); % Initialize arrays to store Cartesian coordinates and velocitiesx = zeros(1, 100);y = zeros(1, 100);z = zeros(1, 100);vx…