Please help me check answer questions #11-17 and #20. I have answered each quiz question. If it is incorrect, please explain why. If it is correct no explanation needs to be made. Thank you for your time :)

Question 11 of 20 ) Let f(x} = sec 2: for x E [0. 22:]. The set of all vertical asymptotes of f is Question 12 of 20 > Let f(x) = >-V2x+5 x-10 Which of the following is true for limx - 10 f(x)? O 10 O O - 10 Does not exist O\fQuestion 14 of 20 ) X E 353'4 0 Does not exist 2:: 5 x Let f(x) = x1 -. Which of the following is true for lim, -o+ f(x)? O 1 O2 O Does not exist O -1Question 16 of 20 Let f(x) = - x+1 x2-2x-3 . Which of the following is true? Of has a removable discontinuity at 3. O f is continuous at -1. Of is defined at 3. O f is defined at -1. Of has a removable discontinuity at -1.Question 17 of 20 > Let f(x) = x . The set of all vertical asymptotes of f is O ( x = 1} O { x = 0} O (x = -1} O (x = 0, x = 1}Question 20 of 20 ) Let f(x} = \"'3'" Which ofthe following is true for limb] x)? xl ' Q Does not exist