Assuming that the following variables have been declared:

String str1 = "Q.E.D.";

String str2 = "Arcturan Megadonkey";

String str3 = "Sirius Cybernetics Corporation";

evaluate the following expressions:

a. str1.length()

b. str2.length()

c. str1.toLowerCase()

d. str2.toUpperCase()

e. str1.substring(2, 4)

f. str2.substring(10, 14)

g. str1.indexOf("D")

h. str1.indexOf(".")

i. str2.indexOf("donkey")

j. str3.indexOf("X")

k. str2 + str3.charAt(17)

l. str3.substring(9, str3.indexOf("e"))

m. str3.substring(7, 12)

n. str2.toLowerCase().substring(9, 13) + str3.substring(18, str3.length() – 7)