An object of mass 0.5 kg is executing simple harmonic motion. Its amplitude is 5 cm and time period (T) is 0.2 s. What will be the potential energy of the object at an instant $\mathrm { t } = \frac { \mathrm { T } } { 4 } \mathrm {~s}$ starting from mean position. Assume that the initial phase of the oscillation is zero.\\
(1) 0.62 J\\
(2) $6.2 \times 10 ^ { - 3 } \mathrm {~J}$\\
(3) $1.2 \times 10 ^ { 3 } \mathrm {~J}$\\
(4) $6.2 \times 10 ^ { 3 } \mathrm {~J}$