For each problem below:a. use our derivative rules to find the derivative off(x)b. find the equation of the tangent line at the given value ac. find the linearization of the function at the same value, ad. use the linearization to estimate the value of the function at the given nearby point be. evaluate the function to find f(b) exactly(Optional but encouraged: use Desmos to graph the function and the tangent line: SEEINGIS BELIEVING).f(x)=2x3-5x-4;a=1,b=1.2f(x)=x2(x2-8x+7);a=4,b=3.9f(x)=x+5x2-1;,a=3,b=3.1f(x)=x3x-24;a=27,b=26f(x)=(x+1x)(x4+x3);a=1,b=0.9