func setComputeMonteCarloButton() {
computeMonteCarloButton.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
computeMonteCarloButton.topAnchor.constraint(equalTo: monteCarloGraph.bottomAnchor, constant: 12).isActive = true
computeMonteCarloButton.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 0.75).isActive = true
computeMonteCarloButton.heightAnchor.constraint(equalToConstant: 50).isActive = true
}