$2\mathrm{.}5.$ A $120-$ strain gage is mounted on a tensile specimen with the gage axis $20$ from the axial direction of the specimen, as shown in Fig. P$2\mathrm{.}5.$ The gage factor is $2\mathrm{.}05.$ What will be the resistance change of the gage if the specimen is subjected to a tensile load of $1000$ lb $?$ Young's modulus and Poisson's ratio of the specimen are $10,000$ ksi and $0\mathrm{.}33,$ respectively.