$(40$ pts$)$ This problem deals with reading input from the keyboard and files and applying simple arithmetic calculations. Create class ProductCumulator with the following methods and steps:

i$.$ void ProductFromKeyboard$()$:

Step $1$: Outputs the following: "Please input a series of positive ints, using the

Step $2$: Takes a sequence of input positive integer values from the keyboard and multiplies them together until a zero or negative integer is encountered.

Step $3$: Prints the product of all positive values provided in Step $2($if none are provided, $1$ is output.$)$

Ex: If the following is input from the keyboard:

$4$

$2$

$7$

$-1$

then the output should be along the lines of "The product of input values is $56.."$

ii$.$ void ProductFromFile$($String filename$)$:

Identical to ProductFromKeyboard, but must take the sequence of integers from the file defined according to filename. You can assume that i$.$ only integer values will be provided and ii$.$ at least one non$-$positive value will be provided in the file. You can and should stop immediately as soon as the non$-$positive value is seen. Ex: if the included file "sample$\_$intsequence.txt$"$ is given as input, the output should be along the lines of "The product of input values is $120."$

Note: You will want to refer to the last part of chapter $2\text{'}$s slides and code for insight into reading input with Java. You will also require if statements.