For f(x) = 6x2 + 48x + 79, determine the following without the use of technology, if they exist. If something does not exist, enter DNE. Use a comma-separated list to enter multiple answers when necessary. (Round your answers to four decimal places if necessary.) (a) vertex (b) axis of symmetry x= (c) domain (Enter your answer using interval notation.) (d) range (Enter your answer using interval notation.) (e) x-intercept(s) smaller x-value (x,y)=() larger x-value (x,y)=( (f) y-intercept (x,y)=() (g) maximum value