You are setting up a continuous integration pipeline with Cloud Build to automate deploying new container images to Google Kubernetes Engine (GKE). The pipeline builds the application from source, executes unit and integration tests in separate steps, and pushes the container to Container Registry. The application is a Python web server.

The Dockerfile is as follows:

FROM python:3.7-alpine
COPY . /app
WORKDIR /app
RUN pip install -r requirements.txt
CMD ["gunicorn", "-w 4", "main:app"]

FROM python:3.7-alpine
COPY . /app
WORKDIR /app
RUN pip install -r requirements.txt
CMD ["gunicorn", "-w 4", "main:app"]

You observe that Cloud Build runs are taking longer than expected. To reduce the build time, what steps should you take? (Select two.)