Hi, please help me solve this, thank you so much in advance

Classwork: 1) a) Evaluate the limit lim x2 - 4x +5 b) Use the precise definition of the limit to prove part a. 2) The function f(x) = (x - 1)2 goes to too as x approaches 1. a) Sketch the graph of f(x). b) Determine how close to 1 x must be so that the function will be bigger than 2500