Should be 1.4, I hope this helps you out
Explanation:
It is given that,
Mass of an object, 
(a) Time period of oscillation, T = 2.4 s
The formula for the time period of spring is given by :

Where
k is the force constant



(b) Displacement in the spring, x = 2.2 m
Energy stored in the spring is given by :



Hence, this is the required solution.
Answer:
19792.96488 years
Explanation:
= Half life of carbon-14 atom = 5730 years
Disintegration is given by

The distintegration constant

The age of the basket is 19792.96488 years