1. Activation functions. Write a program Metivat ionfunction. java to compute various actioation functions that arise in mounl nctwerks. An actrintion function is a function that maps real numbers into a desired ratge, such as berween 0 and 1 or between 1 and +1. The Hewiside step function is given by w(n)=01114ca=0a=0a=0 - The sigmoid function is given by adie=1+1+01 - The hyperbolic tangent function is given by cos(x)=x2+e7x4e The soffsign function is given by A(x)=1+ixa The square manlinearity function is given by All activation functions should return NaN (not a somber) if the argument is NaN, To do so, organixe your peogram according to the follosine public API: Here are some sample executions: 1. Activation functions. Write a program ActivationFunction, java to compute various activation finctions that arise in neural nctiosrlss An activation function is a function that maps real numbers inte a desired range, sach as between 0 and I or between 1 and +1. - The Heaviside step function is given by o The sigmaid function is given by x(x)=1+N11 - The heperbolic saugent function is given by tand(n)=4+c+ - The sofisign function is given by f(i)=1+Xt -. The square nonlinearity function is given by All activation functions should retum NaN (net a number) if the aryumsent is NaN. To do so, organize your program acconding to the follewine poblic API: Here are some sample executions