I just need question 1 a, b, and c.

1. A black body's surface temperature is 7000 C. Now answer the following questions: 1.a. What would be the power density (W/m^2) on its surface? (Points 5) Ans. (i) 1.6*10^8 (ii) 2.6*10^8 (iii) 3.6*10^8 (iv) 4.6*10^8 (v) 5.6*10^8 1.b. What would be the peak wavelength (micrometer) of its radiation? (Points 5) Ans. (i) 0.4 (ii) 0.5 (iii) 0.6 (iv) 0.7 (v) 0.8 1.c. What would be the energy (eV) of this wavelength? (Points 5) Ans. (i) 1 (ii) 3 (iii) 5 (iv) 7 (v) 9 1.d. What would be the approximate photon color? (Points 5) Ans. (1) Green (ii) Yellow (iii) Red (iv) Black (v) Violet 2. At 427 C, what would be the bandgap (eV) of GaAs ? (Point 5) Ans. (i) 0.23 (ii) 0.67 (iii) 1.23 (iv) 1.75 (v) 2.15 3. GaN has conduction band energy level -4.1 eV away from vacuum level and has bandgap of 3.43 eV. Now answer the following questions: 3.a. What would be the position of the intrinsic fermi level (ev)? (Point 5) Ans.(i)-5.82 (ii) -4.1 (ii) -3.43 (iv) 7.53 (v) 0.67 3.b. What would be the position of energy level (eV) valence band? (Point 5) Ans.(i)-5.82 (ii) -4.1 (ii) -3.43 (iv) -7.53 (v) -0.67