High blood pressure can cause left sided cardiac failure. Coronavirus infwction can cause lung fibrosis abd precipitate right sided cardiac failure eventially leading to congestive cardiac failure. However, if blood pressure is under control with healthy heart and lungs, then Coronavirus infection will not pose anh major threat.

Hypertension by itself does not make them vulnerable to Covid 19 but  if someone with hypertension catches corona virus they will be more at risk

If well controlled no problem

Old is associated with a higher risk, similar with hypertension as immunity is lesser than young adults.

Any co morbidity is a additional factor for getting infected by Corona virus, so use mask and maintain all precautions