#include <bits/stdc++.h>

typedef long long ll;
typedef long double ld;

using namespace std;

#define rep(i, a, n) for (int i = (a); i < (n); i++)
#define per(i, a, n) for (int i = (n) - 1; i >= (a); i--)
double dp[100007];

int main(void) {
	ios::sync_with_stdio(false);
	ll n; double w;

	while(cin >> n >> w){
        vector<ll> a(n);
        for(int i=0;i<n;i++){
            dp[i]=0;
            cin >> a[i];
        }
        double worst = 0;
        double sum = 0;
        rep(i,0,n) {
            sum += a[i];
            worst = max(worst, sum / (i+1));
        }
        double best = 1e15;
        sum = 0;
        int cnt = 0;
        per(i,0,n) {
            cnt++;
            sum += a[i];
            best = min(best, sum / cnt);
        }
        cout << fixed << setprecision(12);
        cout << (best/w) << " " << (worst/w)<< endl;
	}
	return 0;
}