Investment appraisal

The following spread sheet shows an evaluation of project B. All cash flows occur at the end if the relevant year, apart from the initial investment which occurs immediately.
A
B
C
D
E
F
G
Description
Year Cashflow ($)
-30,000 12,000 12,000 7,000 7,000 6,000
Cumulative cashflow ($)
-30,000 -18,000 -6,000 1,000 8,000 14,000
Present value factor at 10% per year
1 0.909 0.826 0.751 0.683 0.621
Present value at 10% per year ($)
-30,000 10,908 9,912 5,257 4,781 3,726 4,584
Cumulative Present value at 10% per year ($)
-30,000 -19,092 -9,180 -3,923 858 4,584
1 2 3 4 5
6 Initial Investment 1
7 Operating cashflow 1
8 Operating cashflow 2
9 Operating cashflow 3
10 Operating cashflow 4
11 Operating cashflow 5
12 Net present value 4584(a) What is the discounted payback period of project B (to the nearest whole number)?……………….years
(b) What is the internal rate of return (IRR) of the project (to the nearest whole number) ……..%
Task 3
If project
Help me with this number