Read and understand the following question and answer carefully step by step

Throughout the lockdown due to the Covid-19 pandemic outbreak in United Kingdom, the government announced moratoriums for six months. By October, Tony manage to save a total of $8000 from the moratoriums. He is currently thinking of using the money for investment in stock market. The following are some information of his shortlisted stock he obtained from his broker

	October 1st 2020 December 31st 2020 (expected data)
Stock		Price per share	Beta	Price per share	Beta
Up glove		$10	1.5	$0.50	1.3
Rubber Ria		$5	0.5	$0.15	0.4

a) Calculate Tony's holding period return if he spend all his money equally into the two stocks on 1 October 2020 with intention to sell it back on 31st December 2020.

b) Calculate Tony's portfolio beta in:

i) October

ii) December