1. Assume that x and y are already defined as being of type char. Write a single expression that will return a number whose upper four bits are equal to the upper four bits of y and whose lower 4 bits are equal to the lower 4 bits of x. [Note that this compiler doesn't accept binary constants, so use hexidecimal instead. I.e., for 0b00111111 use 0x3F.]

2.Assume that x and y are already defined as being of type char. Write a single expression that will return a number whose lower four bits are equal to the upper four bits of y and whose upper 4 bits are equal to the lower 4 bits of x (nibbles are swapped from previous problem.) [Note that this compiler doesn't accept binary constants, so use hexidecimal instead. I.e., for 0b00111111 use 0x3F.]