I understand how to do this when im give 'x' as a numbered value. Not sure what to do here.

(18 pts) Let f (x) = e ^{x - 1} + 4.

Answers can be stated without additional work/explanation.

(a) Which describes how the graph of f can be obtained from the graph of y = e^x ?Choice: ________

A. Reflect the graph of y = e^x across the x-axis and shift up by 4 units

B. Reflect the graph of y = e^x across the y-axis and shift up by4 units.

C. Shift the graph of y = e^x to the right by 1 unit and up by 4 units.

D. Shift the graph of y = e^x to the left by 1 unit and up by 4 units.

(b) What is the range of f ?

(c) What is the domain of f ?

(d) What is the horizontal asymptote?

(e) What is the y-intercept? State the approximation to 2 decimal places (i.e., the nearest hundredth).