pip3 install numpy, how to install numpy with python 3 and pip3 on ubuntu18

How to install numpy with python3 , pip3 on ubuntu18.

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Python 3.8.7
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package numpy
Reading package lists... Done
Building dependency tree
Reading state information... Done
python3-pip is already the newest version (9.0.1-2.3~ubuntu1.18.04.4).
0 upgraded, 0 newly installed, 0 to remove and 198 not upgraded.

Command 'pip' not found, but can be installed with:

sudo apt install python-pip

pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)
Collecting numpy
100% |████████████████████████████████| 13.4MB 81kB/s
Installing collected packages: numpy
Successfully installed numpy-1.19.5