Fill in the appropriate code: // Combines the current block…

Fill in the appropriate code: // Combines the current block with the previous block if it is free, and/or the next block if it is free// Returns a pointer to the payload space of the (possibly coalesced) block// Assumes size and allocation information packed together and stored in the header and footer of a block // curr_payload – pointer to the user payload space of a free block static void* coalesce(void* curr_payload){     void* prev_payload = prev_payload_pointer(curr_payload);    void* next_payload = next_payload_pointer(curr_payload);     int prev_alloc = extract_alloc([prev_alloc]);    int next_alloc = extract_alloc([next_alloc]);    // Get size of the current block    size_t size = extract_size([size]);     // Cannot combine current block with previous or next blocks    if(prev_alloc && next_alloc){        return [case1_ret];    }     // Combine current block with next block    else if(prev_alloc && !next_alloc){        size += extract_size(get(get_header_pointer(next_payload)));        set([case2_header], pack(size, 0));        set(get_footer_pointer(next_payload), pack(size, 0));        return curr_payload;    }     // Combine current block with previous block    else if(!prev_alloc && next_alloc){        size += extract_size(get(get_header_pointer(prev_payload)));        set([case3_header], pack(size, 0));        set(get_footer_pointer(curr_payload), pack(size, 0));        return prev_payload;    }     // Combine current block with previous and next blocks    else{        size += extract_size(get(get_header_pointer(prev_payload))) + extract_size(get(get_header_pointer(next_payload)));        set([case4_header], pack(size, 0));        set(get_footer_pointer(next_payload), pack(size, 0));        return prev_payload;    } }

Examine the topographic map above. The locations of 5 differ…

Examine the topographic map above. The locations of 5 different tourist markers are provided (points A-E). During a 100 year flood event, the Yellowstone River will reach a stage of 39 feet. The flood waters are measured from a stream gauge located along the river at 7,686 feet. Which of the tourist markers will survive a 100-year flood? (assume that markers above the flood waters will survive).