Suppose x has an exponential distribution with mean equal to 12. determine the following: (a) upper p left-parenthesis x ⁢ greater-than 10 right-parenthesis (round your answer to 3 decimal places.) (b) upper p left-parenthesis x ⁢ greater-than 20 right-parenthesis (round your answer to 3 decimal places.) (c) upper p left-parenthesis x ⁢ less-than 30 right-parenthesis (round your answer to 3 decimal places.) (d) find the value of x such that upper p left-parenthesis upper x ⁢ less-than x right-parenthesis equals 0.95. (round your answer to 2 decimal pl