The RC circuit shown below has a variable resistance R(t) given by the following expression :

 for 0 ≤ t < T

where R₀ = 1 Ω, and C = 1 F. We are also given that T = 3 R₀C and the source voltage is V_s = 1 V. If the current at time
t = 0 is 1 A, then the current I(t), in amperes, at time t = T/2 is __________ (rounded off to 2 decimal places).