write boolean assignment statement that set b to true when (and only when)

i is greater than 50 or less than 90

i is an even number

c is not 'x' or 'y' or 'z'

d is greater than 10.2 and less than 9.4

Given the declaration of name below, what value is returned by each method call?

string name ="Catherine";

name.indexof('t')

name.substring(3,5)

name.charAt(name.length() -1)