Ticking Timer

Write the whole Timer class. The constructor stores seconds as a whole number; tick() takes one second off but never lets the value drop below 0, so a tick at 0 changes nothing; is_done() returns True once seconds is exactly 0. Do NOT write a main block or any top-level test code; the tests construct the class. Input: two lines, the starting seconds and the number of ticks, read by the tests as whole numbers; they call tick that many times, then print the remaining seconds and what is_done returns on separate lines.