1. Given a 25 MHz FOSC, how long does it take to execute an instruction in nanoseconds? 2. How many instructions are executed in 1 second assuming a 25 MHz FOSC? 3. What is the value of i after executing the following code: uint8 i, j; // i&j defined as unsigned numbers i = 1 ; j = 100; while (i jl); k2 (12 > j2); 5. Write a C function fi (its type is unsigned word) that returns how many elements of an array that satisfies the following property: least significant bit (Bito) is the same as most significant bit (Bit7). The function input parameters are: list: the input array, each element is unsigned byte (uint8) length: number of elements in the list , unsigned byte (unint8) Example: If the input array is {0x80, 0x00, 0x81}, then the function returns the value 2. 6. Write C statements that computes a variable C (word) given two variables: A (byte, a7..a0) and B (word, b15..b0). The variable C equals B except that bits b11..b4 are updated with a7..a0, while other bits of C are same as B. Example: When A=0x7A, B = 0xE102 C = 0xE7A2