Ughh plsss help :((( Danielle needs your help! She is practicing operations with polynomials, but she keeps making mistakes! Find the error(s) that Danielle made for each problem. Help Danielle understand her mistake by explaining the error(s) and then correctly performing the operation.

Consider the function f left parenthesis x right parenthesis equals 4 x squared minus 3 x minus 1f(x)=4x2−3x−1 and complete parts (a) through (c). (a) find f left parenthesis a plus h right parenthesis f(a+h); (b) find startfraction f left parenthesis a plus h right parenthesis minus f left parenthesis a right parenthesis over h endfraction f(a+h)−f(a) h; (c) find the instantaneous rate of change of f when aequals=77.