Which of the following is NOT a valid jump instruction? Select one: O a. jumpgt loop[RO] O b. jumped loop[RO] O c.jumpen loop[RO] O d. jumplt loop[RO] Suppose that xis a variable in memory, x contains 5, R3 contains 7, and R5 contains 9. After executing load R3,x[RO] Select one: O a. x contains 7 O b. R3 contains 7 OC.R3 contains 5 d. R5 contains 3 e. x contains 3 f. R5 contains 7 0 g. All registers remain unchanged