The yield strengthing of a reference alloy is 100 MPa. This strength is proportioned among different mechanisms, with 30

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The yield strengthing of a reference alloy is 100 MPa. This
strength is proportioned among different mechanisms, with 30% due
to grain boundary strengthening, 20% due to solid solution
strengthening, 30% from work hardening, and 20% from precipitation
strengthening. The microstructure and composition is changed so
that the grain size is 120% of the reference value, the solute
concentration is 0.3 times the reference value, the
dislocation density is changed to 4 times the reference value,
and the average precipitate spacing is 120% of the reference
value. Estimate the yield strength of the new alloy,
rounded to the nearest whole number in MPa.