-A particle moving along a line has positions(t) =t⁴34t² m at timetseconds. At which nonnegative times does the particle pass through the origin? (Enter your answers as a comma-separated list. Round your answers to two decimal places.)

-At which nonnegative times is the particle instantaneously motionless (that is, it has zero velocity)? (Enter your answers as a comma-separated list. Round your answers to two decimal places.)