(i) f(x)={2x+5if x≤24x+1if x>2f(x) = \begin{cases} 2x + 5 & \text{if } x \le 2 \\ 4x + 1 & \text{if } x > 2 \end{cases}f(x)={2x+54x+1if x≤2if x>2, c=2c = 2c=2