Write method named isValid which receives one parameter of type double representing a number of hours, and returns true if the number of hours is valid (between 0 and 168 inclusive), false otherwise.

2. I am trying to code the following computation but I am worried that it may result in an ArithmeticException(integer division by zero): int i = 2, j = 4, k = 13, x = 3, y = 8, z = 10; if (z%2==0) x = 0; int r = (j /(k + 2 + i)) / x; Re-write the code (or parts of it) to catch the exception if raised and continue executing the rest of the program.