Part II: $($Bonus$)$

Using defined function calculateTHR$($age$,$RHR$,$INTEN$),$ plot the THR for both, a male and female with a base RHR of $70$ bpm$.$ Assume workout intensity stays constant $(100\%)$ between ages from $12$ to $29$ and start decreasing at a rate of $1\%$ annually starting at year $30$ up to $80$ years.

You may use loops, or you can vectorize the functions to perform this task without the need of looping. Make sure to label your axes, include an appropriate title and include a legend to identify the men and women curves.