add: placeholder infotext under chart

app/lib/widgets/bar_graph/bar_data.dart

@@ -155,8 +155,8 @@ class _BarDataState extends State<BarData> {
                   mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                   children: [
                     _buildLegendItem(Colors.white60, "Snow"),
-                    _buildLegendItem(const Color(0xFF13dbff), "Slush ice"),
                     _buildLegendItem(const Color(0xFF000085), "Black ice"),
+                    _buildLegendItem(const Color(0xFF13dbff), "Slush ice"),
                   ],
                 ),
               ),

app/lib/widgets/main_layout.dart

@@ -264,9 +264,37 @@ class _MapContainerWidgetState extends State<MapContainerWidget> {
                 ),
                 SizedBox(
                   width: screenWidth * boxWidth * 1.2,
-                  height: screenWidth * boxHeight * 1.5,
                   child: const StatCharts(),
-                )
+                ),
+                const SizedBox(height: contPadding*2),
+                SizedBox(
+                  width: screenWidth * boxWidth * 1.2,
+                  child: Padding(
+                    padding: const EdgeInsets.only(top: 20, left: 30),
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        Row(
+                          children: [
+                            const Icon(
+                              Icons.info,
+                              color: Colors.white54,
+                            ),
+                            const SizedBox(width: 10),
+                            Expanded(
+                              child: Text(
+                                'For every x of y, there has to be z cm of '
+                                    'q for every kg of applied weight to ensure ?',
+                                style: regTextStyle,
+                              ),
+                            ),
+                          ],
+                        ),
+                      ],
+                    ),
+                  ),
+                ),
+                const SizedBox(height: contPadding*2),
               ],
             ),
           ],