What is the orbital speed of the earth around the sun

The earth (mas=5.98x10^24) rotates around the sun in an orbit that is approximately circular with radius of 1.5 x 10^11m.
a)Find the orbital speed of the earth around the sun.
b) Find the centripetal acceleration by the earth
THANK YOU!!

Orbital speed of the earth around the sun = 29 km/sec.
Centripetal acceleration by the earth = same as Sun's gravitational acceleration at Earth