To send international first class mail (large envelopes) from the United States to Australia in 2010, it cost $1.24 for the first ounce, $0.84 for each additional ounce up to a total of 8 oz, and $1.72 for each additional four ounces after that up to a total of 64 oz. Let C( x) be the cost to mail x ounces. Find the following.
a. x→3-lim C(x)
b. x→3+lim C(x)
c. x→3lim C(x)
d. C(3)
e. x→14+lim C(x)
f. x→14-lim C(x)
h. x→14lim C(x)
i. Find all values on the interval (0, 64) where the function C is discontinuous.