Problem

Given two equal$-$sized one$-$dimensional arrays a and b$,$ calculate the followings:

multiply the two arrays element$-$wise

add the first element of a and the last element of b

divid even$-$indexed elements of a by even$-$indexed elements of b

Each of the above calculations should become an output value of your function.

Here are some concrete examples of what is expected:

given a $=[3,1,1]$ and b $=[8,2,7],$ the output of the function should be $1)[3*8,1*2,1*7]=[24,2,7]$; $2)3+7=10$; $3)[1/2]=0\mathrm{.}5.$

given a $=[-1,1,-2,2,-3,3]$ and b $=[0,-1,0,-2,0,-3],$ the output of the function should be $1)[-1*0,1*-1,-2*0,2*-2,-3*0,3*-3]=[0,-1,0,-4,0,-9]$; $2)-1+(-3)=-4$; $3)[1/-1,2/-2,3/-3]=[-1,-1,-1].$

Note that the grader generates random assessment cases and above example is not the only assessment cases. You should utilize 'Code to Call Your Function' script box and thoroughly test your function with more input arguments before making a submission.

Task

Write a function element$\_$wise$\_$arithmetic that takes two inputs arguments and returns three output values. The input arrays will not be empty and always be equal in the number of elements, so you don't need to worry about that.