a. Determine if lim

z²-32-3y|

||+|y|

If it exists, enter its value. If it does not exist, enter "DNE".

b. Consider the function

8

xin (a)

0

exists or not. [4 points]

z²-32-3y|

||+|yl

f(x,y)=

Find the value c so that is continuous at (0,0). [2 points]

c

if (x, y) = (0,0)

if (x, y) = (0,0)

E