Software-Engineering

Consider the method mcq ( ):
int mcq(boolean a, boolean b, boolean c, boolean d)
{
   int ans=1;
   if(a) { ans = 2; }
   else if (b) { ans = 3; }
   else if (c) {
                      if (d) { ans = 4; }
   return ans;
}
if
M1 = Number of tests to exhaustively test mcq( );
M2 = Minimum number of tests to achieve full statement coverage for mcq( ); and
M3 = Minimum number of tests to achieve full branch coverage for mcq( );
then (M1, M2, M3) = __________.