Chapter $6$: Functions with Value Parameters Problem $3$: Pentagonal Number Write a function that takes a positive integer and calculates how many dots exist in a pentagonal shape around the center dot on the Nth iteration. In the image below you can see the first iteration is only a sin VF$19$ gle dot. On the second, there are $6$ dots. On the third, there are $16$ dots, and on the fourth there are $31$ dots. Return the number of dots that exist in the whole pentagon on the Nth iteration. Sample input$/$output: Enter an integer: $8$ The number of dots in a pentagonal shape with $8$ iterations is $141$