The model for the creep phenomena is given by: where the strain ()) e(t) = (1 + sin E - the initial stress given by: F/A where F is the force in [N] and A is the cross-section area given in [m^2] E-is a modulus in [MPa] t-is time in [sec] T-is a time constant in [sec] I Assume: E-150[MPa], F-1000[N], A-5[mm^2] and t-20[hrs] 1. Determine the nominal solution for the strain at t=5[hrs] (no errors) 2. Given the errors: AF-Ds%, AA-D6%, AE1-D4%, At-1% Determine the error in the calculations of the strain. 3. Which variable contribute the maximum to the error in %