You have invested $200,000 in an ASX portfolio comprising $90,000 in Lend Lease shares and the remainder in NAB shares. Using the below sample data, what is the expected return [E(r)] of your portfolio (Use arithmetic mean)?

Period	Lend Lease return	NAB return
t-1	4.4%	2.5%
t-2	-2.1%	-0.5%
t-3	1.3%	1.2%
t-4	2.9%	0.7%

(a) E(r) = 1.028%

(b) E(r) = 1.203%

(c) E(r) = 1.499%

(d) Cannot be determined from the available information.

(e) E(r) = 1.268%