Explain very slowly step by step how I can find the contribution to growth made by total factor productivity in this Cobb-Douglas production function equation.Suppose an economy’s production function...

Explain very slowly step by step how I can find the contribution to growth made by total factor productivity in this Cobb-Douglas production function equation.Suppose an economy’s production function is AK?L1-?If the annual rate of economic growth is 3.5%, and labor and capital are growing at 2% annually, what contribution is made by total factor productivity? Labor receives 75% of the total income generated in this model.