70s cartoon question

Does anyone remember a cartoon in the 1970s with 3 superhero characters. A blonde man with super strength, another dark haired man with super speed and a woman with another super power?

Space Sentinels
a.k.a. Young Sentinals

A super advanced entity known as Sentinel One chose three young Earthilings
and granted them abilities that would turn them into legendary heroes: Mercury
for his speed, Hercules for his strength and Astrea for her shape changing ability.
Their duty was to protect the Earth from danger. Their base of operations is a
station within a volcano. The comic relief was their robot sidekick M.O.