Write a function isdecreasing that takes an iterable of numerical values as input and returns a Boolean indicating whether or not the iterable is strictly decreasing. Test your function with the inputs $a=[1,2,3,4,5],b=[5,4,3,2,1,0],$ and $c=[9,8,7,6,5,6].$ Include a table of your test results. $[$Course Objectives #$1$ and #$2]$