Mathematics

Problem

Let

p:\mathbb R\to\mathbb R

be defined by

p(x)=5x-7

and let

I_{\mathbb R}

denote the identity function on

\mathbb R

. a. (i) Calculate

(p\circ I_{\mathbb R})(2)

. b. (ii) Calculate

(I_{\mathbb R}\circ p)(2)