added all the code (Sorry I didn't commit more)

build.gradle

@@ -28,7 +28,7 @@ dependencies {
 // Apply a specific Java toolchain to ease working on different environments.
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        languageVersion = JavaLanguageVersion.of(17)
     }
 }
 

src/main/java/org/frc8033/assessment/car/Car.java

@@ -0,0 +1,6 @@
+package org.frc8033.assessment.car;
+
+public interface Car {
+    float getRangeMi();
+    void drive(float distMi);
+}

src/main/java/org/frc8033/assessment/car/GasCar.java

@@ -0,0 +1,26 @@
+package org.frc8033.assessment.car;
+
+class GasCar implements Car {
+    final float tankSize;
+    float gasMileage;
+    float currGas;
+
+    public GasCar(float tankSize, float gasMileage) {
+        this.tankSize = tankSize;
+        this.gasMileage = gasMileage;
+        this.currGas = tankSize;
+    }
+
+    public void drive(float distMi) {
+        currGas = currGas - distMi/gasMileage < 0 ? 0 : currGas - distMi/ gasMileage;
+    }
+
+    public float getRangeMi() {
+        return currGas * gasMileage;
+    }
+
+    public void fillTank() {
+        currGas = tankSize;
+    }
+
+}

src/main/java/org/frc8033/assessment/car/HondaAccord.java

@@ -0,0 +1,15 @@
+package org.frc8033.assessment.car;
+
+public class HondaAccord extends GasCar {
+    public HondaAccord() {
+        super(15, 32);
+    }
+
+    public HondaAccord(int tankSize, int gasMileage) {
+        super(tankSize, gasMileage);
+    }
+
+    public boolean isStock() {
+        return this.tankSize == 15 && this.gasMileage == 32;
+    }
+}