#include <bits/stdc++.h>
using namespace std;
#define rep(i, a) for (int i = 0; i < (a); i++)
#define rep2(i, a, b) for (int i = (a); i < (b); i++)
#define repr(i, a) for (int i = (a) - 1; i >= 0; i--)
#define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--)
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
template<class T1, class T2> bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
typedef long long ll;

double D(double k, ll x) {
	return k * pow(x, k - 1);
}

double I(double k, ll x) {
	if (k == -1) {
		return log(x);
	} else {
		return pow(x, k + 1) / (k + 1);
	}
}

int main() {
	int n;
	cin >> n;
	int B;
	cin >> B;

	vector<double> a(n);
	rep(i, n) cin >> a[i];

	double ans1 = 0;
	double ans2 = 0;

	rep(i, n) {
		ans1 += D(a[i], B);
		ans2 += I(a[i], B);
	}

	printf("%.20f\n", ans1);
	printf("%.20f\n", ans2);
	
	return 0;
}